diff --git a/backend/src/app/http/errors.clj b/backend/src/app/http/errors.clj
index 2a1c1cd40..febc707de 100644
--- a/backend/src/app/http/errors.clj
+++ b/backend/src/app/http/errors.clj
@@ -10,20 +10,25 @@
 (ns app.http.errors
   "A errors handling for the http server."
   (:require
+   [clojure.pprint :refer [pprint]]
    [app.common.exceptions :as ex]
    [clojure.tools.logging :as log]
    [cuerdas.core :as str]
    [expound.alpha :as expound]))
 
-
 (defn get-context-string
   [request edata]
   (str "=| uri:    " (pr-str (:uri request)) "\n"
        "=| method: " (pr-str (:request-method request)) "\n"
-       "=| params: " (pr-str (:params request)) "\n"
+       "=| params: \n"
+       (with-out-str
+         (pprint (:params request)))
+       "\n"
 
        (when (map? edata)
-         (str "=| ex-data:      " (pr-str edata) "\n"))
+         (str "=| ex-data: \n"
+              (with-out-str
+                (pprint edata))))
 
        "\n"))
 
@@ -33,69 +38,60 @@
       (or (:type edata)
           (class err)))))
 
-(defmethod handle-exception :authorization
-  [err _]
-  {:status 403
-   :body (ex-data err)})
-
 (defmethod handle-exception :authentication
   [err _]
-  {:status 401
-   :body (ex-data err)})
+  {:status 401 :body (ex-data err)})
+
+(defn- explain-error
+  [error]
+  (with-out-str
+    (expound/printer (:data error))))
 
 (defmethod handle-exception :validation
   [err req]
   (let [header (get-in req [:headers "accept"])
         edata  (ex-data err)]
-    (cond
-      (= :spec-validation (:code edata))
-      (if (str/starts-with? header "text/html")
-        {:status 400
-         :headers {"content-type" "text/html"}
-         :body (str "<pre style='font-size:16px'>"
-                    (with-out-str
-                      (expound/printer (:data edata)))
-                    "</pre>\n")}
-        {:status 400
-         :body (assoc edata :explain (with-out-str (expound/printer (:data edata))))})
-
-      :else
+    (if (and (= :spec-validation (:code edata))
+             (str/starts-with? header "text/html"))
       {:status 400
-       :body edata})))
+       :headers {"content-type" "text/html"}
+       :body (str "<pre style='font-size:16px'>"
+                  (explain-error edata)
+                  "</pre>\n")}
+      {:status 400
+       :body   (cond-> edata
+                 (map? (:data edata))
+                 (-> (assoc :explain (explain-error edata))
+                     (dissoc :data)))})))
 
 (defmethod handle-exception :assertion
   [error request]
   (let [edata (ex-data error)]
     (log/error error
-               (str "Assertion error\n"
-                    (get-context-string request edata)
-                    (with-out-str (expound/printer (:data edata)))))
+                (str "Internal error: assertion\n"
+                     (get-context-string request edata)
+                     (explain-error edata)))
     {:status 500
-     :body (assoc edata :explain (with-out-str (expound/printer (:data edata))))}))
+     :body {:type :server-error
+            :data (-> edata
+                      (assoc :explain (explain-error edata))
+                      (dissoc :data))}}))
 
 (defmethod handle-exception :not-found
   [err _]
-  (let [response (ex-data err)]
-    {:status 404
-     :body response}))
-
-(defmethod handle-exception :service-error
-  [err req]
-  (handle-exception (.getCause ^Throwable err) req))
-
+  {:status 404 :body (ex-data err)})
 
 (defmethod handle-exception :default
   [error request]
   (let [edata (ex-data error)]
     (log/error error
-               (str "Internal Error\n"
-                    (get-context-string request edata)))
-    (if (nil? edata)
-      {:status 500
-       :body {:type :server-error
-              :hint (ex-message error)}}
-      {:status 500
-       :body (dissoc edata :data)})))
+                (str "Internal Error: "
+                     (ex-message error)
+                     (get-context-string request edata)))
+    {:status 500
+     :body {:type :server-error
+            :hint (ex-message error)
+            :data edata}}))
 
 (defn handle
   [error req]
diff --git a/backend/src/app/rpc/mutations/projects.clj b/backend/src/app/rpc/mutations/projects.clj
index 766cbdcb5..bb2c4772d 100644
--- a/backend/src/app/rpc/mutations/projects.clj
+++ b/backend/src/app/rpc/mutations/projects.clj
@@ -108,7 +108,8 @@
     (proj/check-edition-permissions! conn profile-id id)
     (db/update! conn :project
                 {:name name}
-                {:id id})))
+                {:id id})
+    nil))
 
 ;; --- Mutation: Delete Project
 
diff --git a/backend/src/app/rpc/queries/viewer.clj b/backend/src/app/rpc/queries/viewer.clj
index 89032bb21..4cb957f20 100644
--- a/backend/src/app/rpc/queries/viewer.clj
+++ b/backend/src/app/rpc/queries/viewer.clj
@@ -71,8 +71,8 @@
   [conn file-id page-id token]
   (let [sql "select exists(select 1 from file_share_token where file_id=? and page_id=? and token=?) as exists"]
     (when-not (:exists (db/exec-one! conn [sql file-id page-id token]))
-      (ex/raise :type :authorization
-                :code :unauthorized-token))))
+      (ex/raise :type :not-found
+                :code :object-not-found))))
 
 (defn retrieve-shared-token
   [conn file-id page-id]
diff --git a/common/app/common/spec.cljc b/common/app/common/spec.cljc
index 8c104e40e..907395b40 100644
--- a/common/app/common/spec.cljc
+++ b/common/app/common/spec.cljc
@@ -140,13 +140,14 @@
   [spec x message context]
   (if (s/valid? spec x)
     x
-    (let [data (s/explain-data spec x)
-          hint (with-out-str (s/explain-out data))]
+    (let [data    (s/explain-data spec x)
+          explain (with-out-str (s/explain-out data))]
       (ex/raise :type :assertion
+                :code :spec-validation
+                :hint message
                 :data data
-                :hint hint
+                :explain explain
                 :context context
-                :message message
                 #?@(:cljs [:stack (.-stack (ex-info message {}))])))))
 
 
@@ -181,13 +182,13 @@
   [spec data]
   (let [result (s/conform spec data)]
     (when (= result ::s/invalid)
-      (let [data (s/explain-data spec data)
-            hint (with-out-str
-                   (s/explain-out data))]
+      (let [data    (s/explain-data spec data)
+            explain (with-out-str
+                      (s/explain-out data))]
         (throw (ex/error :type :validation
                          :code :spec-validation
-                         :data data
-                         :hint hint))))
+                         :explain explain
+                         :data data))))
     result))
 
 (defmacro instrument!
diff --git a/frontend/resources/locales.json b/frontend/resources/locales.json
index e725683ab..7f2466e86 100644
--- a/frontend/resources/locales.json
+++ b/frontend/resources/locales.json
@@ -18,7 +18,7 @@
     }
   },
   "auth.create-demo-account" : {
-    "used-in" : [ "src/app/main/ui/auth/login.cljs:160", "src/app/main/ui/auth/register.cljs:136" ],
+    "used-in" : [ "src/app/main/ui/auth/register.cljs:136", "src/app/main/ui/auth/login.cljs:160" ],
     "translations" : {
       "en" : "Create demo account",
       "fr" : "Vous voulez juste essayer?",
@@ -27,7 +27,7 @@
     }
   },
   "auth.create-demo-profile" : {
-    "used-in" : [ "src/app/main/ui/auth/login.cljs:157", "src/app/main/ui/auth/register.cljs:133" ],
+    "used-in" : [ "src/app/main/ui/auth/register.cljs:133", "src/app/main/ui/auth/login.cljs:157" ],
     "translations" : {
       "en" : "Just wanna try it?",
       "fr" : "Vous voulez juste essayer?",
@@ -45,7 +45,7 @@
     }
   },
   "auth.email" : {
-    "used-in" : [ "src/app/main/ui/auth/login.cljs:99", "src/app/main/ui/auth/register.cljs:101", "src/app/main/ui/auth/recovery_request.cljs:47" ],
+    "used-in" : [ "src/app/main/ui/auth/register.cljs:101", "src/app/main/ui/auth/recovery_request.cljs:47", "src/app/main/ui/auth/login.cljs:99" ],
     "translations" : {
       "en" : "Email",
       "fr" : "Adresse email",
@@ -196,7 +196,7 @@
     }
   },
   "auth.password" : {
-    "used-in" : [ "src/app/main/ui/auth/login.cljs:106", "src/app/main/ui/auth/register.cljs:106" ],
+    "used-in" : [ "src/app/main/ui/auth/register.cljs:106", "src/app/main/ui/auth/login.cljs:106" ],
     "translations" : {
       "en" : "Password",
       "fr" : "Mot de passe",
@@ -259,7 +259,7 @@
     }
   },
   "auth.register-submit" : {
-    "used-in" : [ "src/app/main/ui/auth/login.cljs:134", "src/app/main/ui/auth/register.cljs:110" ],
+    "used-in" : [ "src/app/main/ui/auth/register.cljs:110", "src/app/main/ui/auth/login.cljs:134" ],
     "translations" : {
       "en" : "Create an account",
       "fr" : "Créer un compte",
@@ -295,7 +295,7 @@
     }
   },
   "dashboard.add-shared" : {
-    "used-in" : [ "src/app/main/ui/workspace/header.cljs:225", "src/app/main/ui/dashboard/grid.cljs:180" ],
+    "used-in" : [ "src/app/main/ui/workspace/header.cljs:225", "src/app/main/ui/dashboard/grid.cljs:182" ],
     "translations" : {
       "en" : "Add as Shared Library",
       "fr" : "",
@@ -343,7 +343,7 @@
     }
   },
   "dashboard.empty-files" : {
-    "used-in" : [ "src/app/main/ui/dashboard/grid.cljs:187" ],
+    "used-in" : [ "src/app/main/ui/dashboard/grid.cljs:189" ],
     "translations" : {
       "en" : "You still have no files here",
       "fr" : "Vous n'avez encore aucun fichier ici",
@@ -517,7 +517,7 @@
     }
   },
   "dashboard.num-of-members" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:299" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:301" ],
     "translations" : {
       "en" : "%s members",
       "es" : "%s integrantes"
@@ -542,7 +542,7 @@
     }
   },
   "dashboard.promote-to-owner" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:196" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:198" ],
     "translations" : {
       "en" : "Promote to owner",
       "es" : "Promover a dueño"
@@ -558,7 +558,7 @@
     }
   },
   "dashboard.remove-shared" : {
-    "used-in" : [ "src/app/main/ui/workspace/header.cljs:223", "src/app/main/ui/dashboard/grid.cljs:179" ],
+    "used-in" : [ "src/app/main/ui/workspace/header.cljs:223", "src/app/main/ui/dashboard/grid.cljs:181" ],
     "translations" : {
       "en" : "Remove as Shared Library",
       "fr" : "",
@@ -603,7 +603,7 @@
     }
   },
   "dashboard.show-all-files" : {
-    "used-in" : [ "src/app/main/ui/dashboard/grid.cljs:250" ],
+    "used-in" : [ "src/app/main/ui/dashboard/grid.cljs:252" ],
     "translations" : {
       "en" : "Show all files",
       "es" : "Ver todos los ficheros"
@@ -626,21 +626,21 @@
     }
   },
   "dashboard.team-info" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:282" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:284" ],
     "translations" : {
       "en" : "Team info",
       "es" : "Información del equipo"
     }
   },
   "dashboard.team-members" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:293" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:295" ],
     "translations" : {
       "en" : "Team members",
       "es" : "Integrantes del equipo"
     }
   },
   "dashboard.team-projects" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:302" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:304" ],
     "translations" : {
       "en" : "Team projects",
       "es" : "Proyectos del equipo"
@@ -674,7 +674,7 @@
     }
   },
   "dashboard.update-settings" : {
-    "used-in" : [ "src/app/main/ui/settings/options.cljs:72", "src/app/main/ui/settings/profile.cljs:82", "src/app/main/ui/settings/password.cljs:96" ],
+    "used-in" : [ "src/app/main/ui/settings/profile.cljs:82", "src/app/main/ui/settings/password.cljs:96", "src/app/main/ui/settings/options.cljs:72" ],
     "translations" : {
       "en" : "Update settings",
       "fr" : "Mettre à jour les paramètres",
@@ -796,7 +796,7 @@
     }
   },
   "errors.clipboard-not-implemented" : {
-    "used-in" : [ "src/app/main/data/workspace.cljs:1251" ],
+    "used-in" : [ "src/app/main/data/workspace.cljs:1375" ],
     "translations" : {
       "en" : "Your browser cannot do this operation, please use Ctrl-V",
       "fr" : "",
@@ -805,7 +805,7 @@
     }
   },
   "errors.email-already-exists" : {
-    "used-in" : [ "src/app/main/ui/settings/change_email.cljs:47", "src/app/main/ui/auth/verify_token.cljs:80" ],
+    "used-in" : [ "src/app/main/ui/auth/verify_token.cljs:80", "src/app/main/ui/settings/change_email.cljs:47" ],
     "translations" : {
       "en" : "Email already used",
       "fr" : "Adresse e-mail déjà utilisée",
@@ -832,7 +832,7 @@
     }
   },
   "errors.generic" : {
-    "used-in" : [ "src/app/main/ui/settings/options.cljs:32", "src/app/main/ui/settings/profile.cljs:42", "src/app/main/ui/auth/verify_token.cljs:89" ],
+    "used-in" : [ "src/app/main/ui/auth/verify_token.cljs:89", "src/app/main/ui/settings/profile.cljs:42", "src/app/main/ui/settings/options.cljs:32" ],
     "translations" : {
       "en" : "Something wrong has happened.",
       "fr" : "Quelque chose c'est mal passé.",
@@ -859,7 +859,7 @@
     }
   },
   "errors.media-type-mismatch" : {
-    "used-in" : [ "src/app/main/data/media.cljs:78", "src/app/main/data/workspace/persistence.cljs:394" ],
+    "used-in" : [ "src/app/main/data/workspace/persistence.cljs:381", "src/app/main/data/media.cljs:78" ],
     "translations" : {
       "en" : "Seems that the contents of the image does not match the file extension.",
       "fr" : "",
@@ -868,7 +868,7 @@
     }
   },
   "errors.media-type-not-allowed" : {
-    "used-in" : [ "src/app/main/data/media.cljs:75", "src/app/main/data/workspace/persistence.cljs:391" ],
+    "used-in" : [ "src/app/main/data/workspace/persistence.cljs:378", "src/app/main/data/media.cljs:75" ],
     "translations" : {
       "en" : "Seems that this is not a valid image.",
       "fr" : "",
@@ -913,7 +913,7 @@
     }
   },
   "errors.unexpected-error" : {
-    "used-in" : [ "src/app/main/data/media.cljs:81", "src/app/main/ui/auth/register.cljs:45", "src/app/main/ui/workspace/sidebar/options/exports.cljs:66", "src/app/main/ui/handoff/exports.cljs:41" ],
+    "used-in" : [ "src/app/main/data/media.cljs:81", "src/app/main/ui/workspace/sidebar/options/exports.cljs:66", "src/app/main/ui/auth/register.cljs:45", "src/app/main/ui/handoff/exports.cljs:41" ],
     "translations" : {
       "en" : "An unexpected error occurred.",
       "fr" : "Une erreur inattendue c'est produite",
@@ -986,21 +986,21 @@
     }
   },
   "handoff.attributes.image.download" : {
-    "used-in" : [ "src/app/main/ui/handoff/attributes/image.cljs:45" ],
+    "used-in" : [ "src/app/main/ui/handoff/attributes/image.cljs:61" ],
     "translations" : {
       "en" : "Dowload source image",
       "es" : "Descargar imagen original"
     }
   },
   "handoff.attributes.image.height" : {
-    "used-in" : [ "src/app/main/ui/handoff/attributes/image.cljs:37" ],
+    "used-in" : [ "src/app/main/ui/handoff/attributes/image.cljs:49" ],
     "translations" : {
       "en" : "Height",
       "es" : "Altura"
     }
   },
   "handoff.attributes.image.width" : {
-    "used-in" : [ "src/app/main/ui/handoff/attributes/image.cljs:32" ],
+    "used-in" : [ "src/app/main/ui/handoff/attributes/image.cljs:44" ],
     "translations" : {
       "en" : "Width",
       "es" : "Ancho"
@@ -1368,7 +1368,7 @@
     "unused" : true
   },
   "labels.admin" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:85", "src/app/main/ui/dashboard/team.cljs:174", "src/app/main/ui/dashboard/team.cljs:190" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:85", "src/app/main/ui/dashboard/team.cljs:176", "src/app/main/ui/dashboard/team.cljs:192" ],
     "translations" : {
       "en" : "Admin",
       "es" : "Administración"
@@ -1381,6 +1381,18 @@
       "es" : "Todo"
     }
   },
+  "labels.bad-gateway.desc-message" : {
+    "used-in" : [ "src/app/main/ui/static.cljs:58" ],
+    "translations" : {
+      "en" : "Looks like you need to wait a bit and retry; we are performing small maintenance of our servers."
+    }
+  },
+  "labels.bad-gateway.main-message" : {
+    "used-in" : [ "src/app/main/ui/static.cljs:57" ],
+    "translations" : {
+      "en" : "Bad Gateway"
+    }
+  },
   "labels.cancel" : {
     "used-in" : [ "src/app/main/ui/dashboard/sidebar.cljs:201" ],
     "translations" : {
@@ -1414,7 +1426,7 @@
     }
   },
   "labels.delete" : {
-    "used-in" : [ "src/app/main/ui/dashboard/files.cljs:85", "src/app/main/ui/dashboard/grid.cljs:177" ],
+    "used-in" : [ "src/app/main/ui/dashboard/grid.cljs:179", "src/app/main/ui/dashboard/files.cljs:85" ],
     "translations" : {
       "en" : "Delete",
       "fr" : "Supprimer",
@@ -1453,14 +1465,14 @@
     }
   },
   "labels.editor" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:86", "src/app/main/ui/dashboard/team.cljs:177", "src/app/main/ui/dashboard/team.cljs:191" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:86", "src/app/main/ui/dashboard/team.cljs:179", "src/app/main/ui/dashboard/team.cljs:193" ],
     "translations" : {
       "en" : "Editor",
       "es" : "Editor"
     }
   },
   "labels.email" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:112", "src/app/main/ui/dashboard/team.cljs:215" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:114", "src/app/main/ui/dashboard/team.cljs:217" ],
     "translations" : {
       "en" : "Email",
       "fr" : "Adresse email",
@@ -1478,7 +1490,7 @@
     }
   },
   "labels.hide-resolved-comments" : {
-    "used-in" : [ "src/app/main/ui/viewer/header.cljs:175", "src/app/main/ui/workspace/comments.cljs:129" ],
+    "used-in" : [ "src/app/main/ui/workspace/comments.cljs:129", "src/app/main/ui/viewer/header.cljs:175" ],
     "translations" : {
       "en" : "Hide resolved comments",
       "es" : "Ocultar comentarios resueltos"
@@ -1503,14 +1515,14 @@
     }
   },
   "labels.members" : {
-    "used-in" : [ "src/app/main/ui/dashboard/sidebar.cljs:297", "src/app/main/ui/dashboard/team.cljs:60", "src/app/main/ui/dashboard/team.cljs:66" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:60", "src/app/main/ui/dashboard/team.cljs:66", "src/app/main/ui/dashboard/sidebar.cljs:297" ],
     "translations" : {
       "en" : "Members",
       "es" : "Integrantes"
     }
   },
   "labels.name" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:214" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:216" ],
     "translations" : {
       "en" : "Name",
       "fr" : "Nom",
@@ -1534,15 +1546,33 @@
       "es" : "No tienes notificaciones de comentarios pendientes"
     }
   },
+  "labels.not-found.auth-info" : {
+    "used-in" : [ "src/app/main/ui/static.cljs:42" ],
+    "translations" : {
+      "en" : "You’re signed in as"
+    }
+  },
+  "labels.not-found.desc-message" : {
+    "used-in" : [ "src/app/main/ui/static.cljs:40" ],
+    "translations" : {
+      "en" : "This page might not exist or you don’t have permissions to access to it."
+    }
+  },
+  "labels.not-found.main-message" : {
+    "used-in" : [ "src/app/main/ui/static.cljs:39" ],
+    "translations" : {
+      "en" : "Oops!"
+    }
+  },
   "labels.num-of-files" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:308" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:310" ],
     "translations" : {
       "en" : [ "1 file", "%s files" ],
       "es" : [ "1 archivo", "%s archivos" ]
     }
   },
   "labels.num-of-projects" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:305" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:307" ],
     "translations" : {
       "en" : [ "1 project", "%s projects" ],
       "es" : [ "1 proyecto", "%s proyectos" ]
@@ -1565,7 +1595,7 @@
     }
   },
   "labels.owner" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:171", "src/app/main/ui/dashboard/team.cljs:296" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:173", "src/app/main/ui/dashboard/team.cljs:298" ],
     "translations" : {
       "en" : "Owner",
       "es" : "Dueño"
@@ -1581,7 +1611,7 @@
     }
   },
   "labels.permissions" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:216" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:218" ],
     "translations" : {
       "en" : "Permissions",
       "es" : "Permisos"
@@ -1606,7 +1636,7 @@
     }
   },
   "labels.remove" : {
-    "used-in" : [ "src/app/main/ui/workspace/libraries.cljs:92", "src/app/main/ui/dashboard/team.cljs:202" ],
+    "used-in" : [ "src/app/main/ui/workspace/libraries.cljs:92", "src/app/main/ui/dashboard/team.cljs:204" ],
     "translations" : {
       "en" : "Remove",
       "fr" : "",
@@ -1615,12 +1645,18 @@
     }
   },
   "labels.rename" : {
-    "used-in" : [ "src/app/main/ui/dashboard/sidebar.cljs:300", "src/app/main/ui/dashboard/files.cljs:84", "src/app/main/ui/dashboard/grid.cljs:176" ],
+    "used-in" : [ "src/app/main/ui/dashboard/grid.cljs:178", "src/app/main/ui/dashboard/sidebar.cljs:300", "src/app/main/ui/dashboard/files.cljs:84" ],
     "translations" : {
       "en" : "Rename",
       "es" : "Renombrar"
     }
   },
+  "labels.retry" : {
+    "used-in" : [ "src/app/main/ui/static.cljs:62", "src/app/main/ui/static.cljs:79" ],
+    "translations" : {
+      "en" : "Retry"
+    }
+  },
   "labels.role" : {
     "used-in" : [ "src/app/main/ui/dashboard/team.cljs:84" ],
     "translations" : {
@@ -1628,8 +1664,20 @@
       "es" : "Cargo"
     }
   },
+  "labels.service-unavailable.desc-message" : {
+    "used-in" : [ "src/app/main/ui/static.cljs:75" ],
+    "translations" : {
+      "en" : "We are in programmed maintenance of our systems."
+    }
+  },
+  "labels.service-unavailable.main-message" : {
+    "used-in" : [ "src/app/main/ui/static.cljs:74" ],
+    "translations" : {
+      "en" : "Service Unavailable"
+    }
+  },
   "labels.settings" : {
-    "used-in" : [ "src/app/main/ui/settings/sidebar.cljs:80", "src/app/main/ui/dashboard/sidebar.cljs:298", "src/app/main/ui/dashboard/team.cljs:61", "src/app/main/ui/dashboard/team.cljs:68" ],
+    "used-in" : [ "src/app/main/ui/settings/sidebar.cljs:80", "src/app/main/ui/dashboard/team.cljs:61", "src/app/main/ui/dashboard/team.cljs:68", "src/app/main/ui/dashboard/sidebar.cljs:298" ],
     "translations" : {
       "en" : "Settings",
       "fr" : "Settings",
@@ -1647,19 +1695,28 @@
     }
   },
   "labels.show-all-comments" : {
-    "used-in" : [ "src/app/main/ui/viewer/header.cljs:163", "src/app/main/ui/workspace/comments.cljs:117" ],
+    "used-in" : [ "src/app/main/ui/workspace/comments.cljs:117", "src/app/main/ui/viewer/header.cljs:163" ],
     "translations" : {
       "en" : "Show all comments",
       "es" : "Mostrar todos los comentarios"
     }
   },
   "labels.show-your-comments" : {
-    "used-in" : [ "src/app/main/ui/viewer/header.cljs:168", "src/app/main/ui/workspace/comments.cljs:122" ],
+    "used-in" : [ "src/app/main/ui/workspace/comments.cljs:122", "src/app/main/ui/viewer/header.cljs:168" ],
     "translations" : {
       "en" : "Show only yours comments",
       "es" : "Mostrar sólo tus comentarios"
     }
   },
+  "labels.sign-out" : {
+    "used-in" : [ "src/app/main/ui/static.cljs:45" ],
+    "translations" : {
+      "en" : "Sign out",
+      "fr" : "Quitter",
+      "ru" : "Выход",
+      "es" : "Salir"
+    }
+  },
   "labels.update" : {
     "used-in" : [ "src/app/main/ui/settings/profile.cljs:104" ],
     "translations" : {
@@ -1670,7 +1727,7 @@
     }
   },
   "labels.viewer" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:87", "src/app/main/ui/dashboard/team.cljs:180", "src/app/main/ui/dashboard/team.cljs:192" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:87", "src/app/main/ui/dashboard/team.cljs:182", "src/app/main/ui/dashboard/team.cljs:194" ],
     "translations" : {
       "en" : "Viewer",
       "es" : "Visualizador"
@@ -1684,7 +1741,7 @@
     }
   },
   "media.loading" : {
-    "used-in" : [ "src/app/main/data/media.cljs:60", "src/app/main/data/workspace/persistence.cljs:472", "src/app/main/data/workspace/persistence.cljs:527" ],
+    "used-in" : [ "src/app/main/data/workspace/persistence.cljs:459", "src/app/main/data/workspace/persistence.cljs:514", "src/app/main/data/media.cljs:60" ],
     "translations" : {
       "en" : "Loading image...",
       "fr" : "Chargement de l'image...",
@@ -1852,13 +1909,13 @@
     }
   },
   "modals.delete-page.body" : {
-    "used-in" : [ "src/app/main/ui/workspace/sidebar/sitemap.cljs:45" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/sitemap.cljs:60" ],
     "translations" : {
       "en" : "Are you sure you want to delete this page?"
     }
   },
   "modals.delete-page.title" : {
-    "used-in" : [ "src/app/main/ui/workspace/sidebar/sitemap.cljs:44" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/sitemap.cljs:59" ],
     "translations" : {
       "en" : "Delete page"
     }
@@ -1906,28 +1963,28 @@
     }
   },
   "modals.delete-team-member-confirm.accept" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:160" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:162" ],
     "translations" : {
       "en" : "Delete member",
       "es" : "Eliminando miembro"
     }
   },
   "modals.delete-team-member-confirm.message" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:159" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:161" ],
     "translations" : {
       "en" : "Are you sure you want to delete this member from the team?",
       "es" : "¿Seguro que quieres eliminar este integrante del equipo?"
     }
   },
   "modals.delete-team-member-confirm.title" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:158" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:160" ],
     "translations" : {
       "en" : "Delete team member",
       "es" : "Eliminar integrante del equipo"
     }
   },
   "modals.invite-member.title" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:108" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:110" ],
     "translations" : {
       "en" : "Invite to join the team",
       "es" : "Invitar a unirse al equipo"
@@ -1990,21 +2047,21 @@
     }
   },
   "modals.promote-owner-confirm.accept" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:147" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:149" ],
     "translations" : {
       "en" : "Promote",
       "es" : "Promocionar"
     }
   },
   "modals.promote-owner-confirm.message" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:146" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:148" ],
     "translations" : {
       "en" : "Are you sure you want to promote this user to owner?",
       "es" : "¿Seguro que quieres promocionar este usuario a dueño?"
     }
   },
   "modals.promote-owner-confirm.title" : {
-    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:145" ],
+    "used-in" : [ "src/app/main/ui/dashboard/team.cljs:147" ],
     "translations" : {
       "en" : "Promote to owner",
       "es" : "Promocionar a dueño"
@@ -2047,7 +2104,7 @@
     }
   },
   "notifications.profile-saved" : {
-    "used-in" : [ "src/app/main/ui/settings/options.cljs:36", "src/app/main/ui/settings/profile.cljs:38" ],
+    "used-in" : [ "src/app/main/ui/settings/profile.cljs:38", "src/app/main/ui/settings/options.cljs:36" ],
     "translations" : {
       "en" : "Profile saved successfully!",
       "fr" : "Profil enregistré avec succès!",
@@ -2056,7 +2113,7 @@
     }
   },
   "notifications.validation-email-sent" : {
-    "used-in" : [ "src/app/main/ui/settings/change_email.cljs:56", "src/app/main/ui/auth/register.cljs:54" ],
+    "used-in" : [ "src/app/main/ui/auth/register.cljs:54", "src/app/main/ui/settings/change_email.cljs:56" ],
     "translations" : {
       "en" : "Verification email sent to %s. Check your email!",
       "es" : "Verificación de email enviada a %s. Comprueba tu correo."
@@ -2072,7 +2129,7 @@
     }
   },
   "settings.multiple" : {
-    "used-in" : [ "src/app/main/ui/workspace/sidebar/options/shadow.cljs:213", "src/app/main/ui/workspace/sidebar/options/rows/color_row.cljs:161", "src/app/main/ui/workspace/sidebar/options/rows/color_row.cljs:170", "src/app/main/ui/workspace/sidebar/options/typography.cljs:99", "src/app/main/ui/workspace/sidebar/options/typography.cljs:149", "src/app/main/ui/workspace/sidebar/options/typography.cljs:162", "src/app/main/ui/workspace/sidebar/options/blur.cljs:79", "src/app/main/ui/workspace/sidebar/options/stroke.cljs:154" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/options/stroke.cljs:154", "src/app/main/ui/workspace/sidebar/options/rows/color_row.cljs:161", "src/app/main/ui/workspace/sidebar/options/rows/color_row.cljs:170", "src/app/main/ui/workspace/sidebar/options/typography.cljs:99", "src/app/main/ui/workspace/sidebar/options/typography.cljs:149", "src/app/main/ui/workspace/sidebar/options/typography.cljs:162", "src/app/main/ui/workspace/sidebar/options/shadow.cljs:213", "src/app/main/ui/workspace/sidebar/options/blur.cljs:79" ],
     "translations" : {
       "en" : "Mixed",
       "fr" : null,
@@ -2351,7 +2408,7 @@
     }
   },
   "workspace.assets.delete" : {
-    "used-in" : [ "src/app/main/ui/workspace/sidebar/assets.cljs:140", "src/app/main/ui/workspace/sidebar/assets.cljs:260", "src/app/main/ui/workspace/sidebar/assets.cljs:375", "src/app/main/ui/workspace/sidebar/assets.cljs:504" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/sitemap.cljs:151", "src/app/main/ui/workspace/sidebar/assets.cljs:140", "src/app/main/ui/workspace/sidebar/assets.cljs:260", "src/app/main/ui/workspace/sidebar/assets.cljs:375", "src/app/main/ui/workspace/sidebar/assets.cljs:504" ],
     "translations" : {
       "en" : "Delete",
       "fr" : "",
@@ -2360,7 +2417,7 @@
     }
   },
   "workspace.assets.duplicate" : {
-    "used-in" : [ "src/app/main/ui/workspace/sidebar/assets.cljs:139" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/sitemap.cljs:155", "src/app/main/ui/workspace/sidebar/assets.cljs:139" ],
     "translations" : {
       "en" : "Duplicate",
       "fr" : "",
@@ -2414,7 +2471,7 @@
     }
   },
   "workspace.assets.rename" : {
-    "used-in" : [ "src/app/main/ui/workspace/sidebar/assets.cljs:138", "src/app/main/ui/workspace/sidebar/assets.cljs:259", "src/app/main/ui/workspace/sidebar/assets.cljs:373", "src/app/main/ui/workspace/sidebar/assets.cljs:502" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/sitemap.cljs:154", "src/app/main/ui/workspace/sidebar/assets.cljs:138", "src/app/main/ui/workspace/sidebar/assets.cljs:259", "src/app/main/ui/workspace/sidebar/assets.cljs:373", "src/app/main/ui/workspace/sidebar/assets.cljs:502" ],
     "translations" : {
       "en" : "Rename",
       "fr" : "",
@@ -2502,14 +2559,14 @@
     }
   },
   "workspace.gradients.linear" : {
-    "used-in" : [ "src/app/main/data/workspace/libraries.cljs:43", "src/app/main/ui/components/color_bullet.cljs:31" ],
+    "used-in" : [ "src/app/main/data/workspace/libraries.cljs:72", "src/app/main/ui/components/color_bullet.cljs:31" ],
     "translations" : {
       "en" : "Linear gradient",
       "es" : "Degradado lineal"
     }
   },
   "workspace.gradients.radial" : {
-    "used-in" : [ "src/app/main/data/workspace/libraries.cljs:44", "src/app/main/ui/components/color_bullet.cljs:32" ],
+    "used-in" : [ "src/app/main/data/workspace/libraries.cljs:73", "src/app/main/ui/components/color_bullet.cljs:32" ],
     "translations" : {
       "en" : "Radial gradient",
       "es" : "Degradado radial"
@@ -2706,21 +2763,21 @@
     }
   },
   "workspace.libraries.colors.big-thumbnails" : {
-    "used-in" : [ "src/app/main/ui/workspace/colorpalette.cljs:170" ],
+    "used-in" : [ "src/app/main/ui/workspace/colorpalette.cljs:171" ],
     "translations" : {
       "en" : "Big thumbnails",
       "es" : "Miniaturas grandes"
     }
   },
   "workspace.libraries.colors.file-library" : {
-    "used-in" : [ "src/app/main/ui/workspace/colorpicker/libraries.cljs:89", "src/app/main/ui/workspace/colorpalette.cljs:148" ],
+    "used-in" : [ "src/app/main/ui/workspace/colorpicker/libraries.cljs:89", "src/app/main/ui/workspace/colorpalette.cljs:149" ],
     "translations" : {
       "en" : "File library",
       "es" : "Biblioteca del archivo"
     }
   },
   "workspace.libraries.colors.recent-colors" : {
-    "used-in" : [ "src/app/main/ui/workspace/colorpicker/libraries.cljs:88", "src/app/main/ui/workspace/colorpalette.cljs:158" ],
+    "used-in" : [ "src/app/main/ui/workspace/colorpicker/libraries.cljs:88", "src/app/main/ui/workspace/colorpalette.cljs:159" ],
     "translations" : {
       "en" : "Recent colors",
       "es" : "Colores recientes"
@@ -2734,7 +2791,7 @@
     }
   },
   "workspace.libraries.colors.small-thumbnails" : {
-    "used-in" : [ "src/app/main/ui/workspace/colorpalette.cljs:175" ],
+    "used-in" : [ "src/app/main/ui/workspace/colorpalette.cljs:176" ],
     "translations" : {
       "en" : "Small thumbnails",
       "es" : "Miniaturas pequeñas"
@@ -3251,7 +3308,7 @@
     }
   },
   "workspace.options.position" : {
-    "used-in" : [ "src/app/main/ui/workspace/sidebar/options/frame.cljs:118", "src/app/main/ui/workspace/sidebar/options/measures.cljs:146" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/options/measures.cljs:146", "src/app/main/ui/workspace/sidebar/options/frame.cljs:118" ],
     "translations" : {
       "en" : "Position",
       "fr" : "Position",
@@ -3384,7 +3441,7 @@
     }
   },
   "workspace.options.size" : {
-    "used-in" : [ "src/app/main/ui/workspace/sidebar/options/frame.cljs:93", "src/app/main/ui/workspace/sidebar/options/measures.cljs:118" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/options/measures.cljs:118", "src/app/main/ui/workspace/sidebar/options/frame.cljs:93" ],
     "translations" : {
       "en" : "Size",
       "fr" : "Taille",
@@ -3594,7 +3651,7 @@
     }
   },
   "workspace.options.text-options.none" : {
-    "used-in" : [ "src/app/main/ui/workspace/sidebar/options/typography.cljs:176", "src/app/main/ui/workspace/sidebar/options/text.cljs:153" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/options/text.cljs:153", "src/app/main/ui/workspace/sidebar/options/typography.cljs:176" ],
     "translations" : {
       "en" : "None",
       "fr" : "Aucune",
@@ -3733,7 +3790,7 @@
     }
   },
   "workspace.shape.menu.detach-instance" : {
-    "used-in" : [ "src/app/main/ui/workspace/context_menu.cljs:163", "src/app/main/ui/workspace/context_menu.cljs:173", "src/app/main/ui/workspace/sidebar/options/component.cljs:79", "src/app/main/ui/workspace/sidebar/options/component.cljs:84" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/options/component.cljs:79", "src/app/main/ui/workspace/sidebar/options/component.cljs:84", "src/app/main/ui/workspace/context_menu.cljs:163", "src/app/main/ui/workspace/context_menu.cljs:173" ],
     "translations" : {
       "en" : "Detach instance",
       "es" : "Desacoplar instancia"
@@ -3761,7 +3818,7 @@
     }
   },
   "workspace.shape.menu.go-master" : {
-    "used-in" : [ "src/app/main/ui/workspace/context_menu.cljs:177", "src/app/main/ui/workspace/sidebar/options/component.cljs:86" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/options/component.cljs:86", "src/app/main/ui/workspace/context_menu.cljs:177" ],
     "translations" : {
       "en" : "Go to master component file",
       "es" : "Ir al archivo del componente maestro"
@@ -3803,7 +3860,7 @@
     }
   },
   "workspace.shape.menu.reset-overrides" : {
-    "used-in" : [ "src/app/main/ui/workspace/context_menu.cljs:165", "src/app/main/ui/workspace/context_menu.cljs:175", "src/app/main/ui/workspace/sidebar/options/component.cljs:80", "src/app/main/ui/workspace/sidebar/options/component.cljs:85" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/options/component.cljs:80", "src/app/main/ui/workspace/sidebar/options/component.cljs:85", "src/app/main/ui/workspace/context_menu.cljs:165", "src/app/main/ui/workspace/context_menu.cljs:175" ],
     "translations" : {
       "en" : "Reset overrides",
       "es" : "Deshacer modificaciones"
@@ -3817,7 +3874,7 @@
     }
   },
   "workspace.shape.menu.show-master" : {
-    "used-in" : [ "src/app/main/ui/workspace/context_menu.cljs:169", "src/app/main/ui/workspace/sidebar/options/component.cljs:82" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/options/component.cljs:82", "src/app/main/ui/workspace/context_menu.cljs:169" ],
     "translations" : {
       "en" : "Show master component",
       "es" : "Ver componente maestro"
@@ -3845,7 +3902,7 @@
     }
   },
   "workspace.shape.menu.update-master" : {
-    "used-in" : [ "src/app/main/ui/workspace/context_menu.cljs:167", "src/app/main/ui/workspace/sidebar/options/component.cljs:81" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/options/component.cljs:81", "src/app/main/ui/workspace/context_menu.cljs:167" ],
     "translations" : {
       "en" : "Update master component",
       "es" : "Actualizar componente maestro"
@@ -3861,7 +3918,7 @@
     "unused" : true
   },
   "workspace.sidebar.sitemap" : {
-    "used-in" : [ "src/app/main/ui/workspace/sidebar/sitemap.cljs:171" ],
+    "used-in" : [ "src/app/main/ui/workspace/sidebar/sitemap.cljs:207" ],
     "translations" : {
       "en" : "Pages",
       "fr" : "Pages",
@@ -4244,7 +4301,7 @@
     }
   },
   "workspace.updates.dismiss" : {
-    "used-in" : [ "src/app/main/data/workspace/libraries.cljs:649" ],
+    "used-in" : [ "src/app/main/data/workspace/libraries.cljs:697" ],
     "translations" : {
       "en" : "Dismiss",
       "fr" : "",
@@ -4253,7 +4310,7 @@
     }
   },
   "workspace.updates.there-are-updates" : {
-    "used-in" : [ "src/app/main/data/workspace/libraries.cljs:645" ],
+    "used-in" : [ "src/app/main/data/workspace/libraries.cljs:693" ],
     "translations" : {
       "en" : "There are updates in shared libraries",
       "fr" : "",
@@ -4262,7 +4319,7 @@
     }
   },
   "workspace.updates.update" : {
-    "used-in" : [ "src/app/main/data/workspace/libraries.cljs:647" ],
+    "used-in" : [ "src/app/main/data/workspace/libraries.cljs:695" ],
     "translations" : {
       "en" : "Update",
       "fr" : "",
diff --git a/frontend/resources/styles/main-default.scss b/frontend/resources/styles/main-default.scss
index a18f57a44..8c6c1e622 100644
--- a/frontend/resources/styles/main-default.scss
+++ b/frontend/resources/styles/main-default.scss
@@ -12,22 +12,22 @@
 //
 //#################################################
 
-@import 'common/dependencies/colors';
-@import 'common/dependencies/helpers';
-@import 'common/dependencies/mixin';
-@import 'common/dependencies/fonts';
-@import 'common/dependencies/reset';
-@import 'common/dependencies/animations';
-@import 'common/dependencies/z-index';
-@import 'common/dependencies/highlightjs-theme';
+@import "common/dependencies/colors";
+@import "common/dependencies/helpers";
+@import "common/dependencies/mixin";
+@import "common/dependencies/fonts";
+@import "common/dependencies/reset";
+@import "common/dependencies/animations";
+@import "common/dependencies/z-index";
+@import "common/dependencies/highlightjs-theme";
 
 //#################################################
 // Layouts
 //#################################################
 
-@import 'common/base';
-@import 'main/layouts/login';
-@import 'main/layouts/main-layout';
+@import "common/base";
+@import "main/layouts/login";
+@import "main/layouts/main-layout";
 @import "main/layouts/not-found";
 @import "main/layouts/viewer";
 @import "main/layouts/handoff";
@@ -36,12 +36,12 @@
 // Commons
 //#################################################
 
-@import 'common/framework';
-@import 'main/partials/modal';
-@import 'main/partials/forms';
+@import "common/framework";
+@import "main/partials/modal";
+@import "main/partials/forms";
 @import "main/partials/texts";
-@import 'main/partials/context-menu';
-@import 'main/partials/dropdown';
+@import "main/partials/context-menu";
+@import "main/partials/dropdown";
 
 //#################################################
 // Partials
@@ -51,35 +51,36 @@
 @import "main/partials/viewer-header";
 @import "main/partials/viewer-thumbnails";
 @import "main/partials/zoom-widget";
-@import 'main/partials/activity-bar';
-@import 'main/partials/color-palette';
-@import 'main/partials/colorpicker';
-@import 'main/partials/dashboard';
-@import 'main/partials/dashboard-header';
-@import 'main/partials/dashboard-grid';
-@import 'main/partials/dashboard-sidebar';
-@import 'main/partials/dashboard-team';
-@import 'main/partials/dashboard-settings';
-@import 'main/partials/debug-icons-preview';
-@import 'main/partials/editable-label';
-@import 'main/partials/left-toolbar';
-@import 'main/partials/loader';
-@import 'main/partials/project-bar';
-@import 'main/partials/sidebar';
-@import 'main/partials/sidebar-align-options';
-@import 'main/partials/sidebar-assets';
-@import 'main/partials/sidebar-document-history';
-@import 'main/partials/sidebar-element-options';
-@import 'main/partials/sidebar-icons';
-@import 'main/partials/sidebar-interactions';
-@import 'main/partials/sidebar-layers';
-@import 'main/partials/sidebar-sitemap';
-@import 'main/partials/sidebar-tools';
-@import 'main/partials/tab-container';
-@import 'main/partials/tool-bar';
-@import 'main/partials/user-settings';
-@import 'main/partials/workspace';
-@import 'main/partials/workspace-header';
-@import 'main/partials/comments';
-@import 'main/partials/color-bullet';
+@import "main/partials/activity-bar";
+@import "main/partials/color-palette";
+@import "main/partials/colorpicker";
+@import "main/partials/dashboard";
+@import "main/partials/dashboard-header";
+@import "main/partials/dashboard-grid";
+@import "main/partials/dashboard-sidebar";
+@import "main/partials/dashboard-team";
+@import "main/partials/dashboard-settings";
+@import "main/partials/debug-icons-preview";
+@import "main/partials/editable-label";
+@import "main/partials/left-toolbar";
+@import "main/partials/loader";
+@import "main/partials/project-bar";
+@import "main/partials/sidebar";
+@import "main/partials/sidebar-align-options";
+@import "main/partials/sidebar-assets";
+@import "main/partials/sidebar-document-history";
+@import "main/partials/sidebar-element-options";
+@import "main/partials/sidebar-icons";
+@import "main/partials/sidebar-interactions";
+@import "main/partials/sidebar-layers";
+@import "main/partials/sidebar-sitemap";
+@import "main/partials/sidebar-tools";
+@import "main/partials/tab-container";
+@import "main/partials/tool-bar";
+@import "main/partials/user-settings";
+@import "main/partials/workspace";
+@import "main/partials/workspace-header";
+@import "main/partials/comments";
+@import "main/partials/color-bullet";
 @import "main/partials/handoff";
+@import "main/partials/exception-page";
diff --git a/frontend/resources/styles/main/layouts/not-found.scss b/frontend/resources/styles/main/layouts/not-found.scss
index 8b14d9862..fbecd5910 100644
--- a/frontend/resources/styles/main/layouts/not-found.scss
+++ b/frontend/resources/styles/main/layouts/not-found.scss
@@ -29,34 +29,55 @@
   justify-content: center;
   align-items: center;
 
-  .error-img {
+
+  .container {
+    max-width: 600px;
+  }
+
+  .image {
     align-items: center;
     display: flex;
     justify-content: center;
     margin-bottom: 2rem;
 
     svg {
-      height: 320px;
-      width: 200px;
+      height: 220px;
+      width: 220px;
     }
   }
 
   .main-message {
     color: $color-black;
-    font-size: 11rem;
-    line-height: 200px;
+    font-size: 5rem;
+    line-height: 150px;
     text-align: center;
   }
 
   .desc-message {
     color: $color-black;
-    font-size: 2.2rem;
+    font-size: 1.6rem;
     font-weight: 300;
     text-align: center;
   }
 
-  .btn-primary {
-    margin-top: $x-big;
+  .sign-info {
+    margin-top: 20px;
+    color: $color-black;
+    font-size: 1rem;
+    font-weight: 200;
+    text-align: center;
+
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+
+    b {
+      font-weight: 400;
+    }
+
+    .btn-primary {
+      margin-top: 15px;
+    }
   }
 }
 
diff --git a/frontend/resources/styles/main/partials/exception-page.scss b/frontend/resources/styles/main/partials/exception-page.scss
new file mode 100644
index 000000000..c2ab1a3a8
--- /dev/null
+++ b/frontend/resources/styles/main/partials/exception-page.scss
@@ -0,0 +1,83 @@
+.exception-layout {
+  display: grid;
+
+  grid-template-rows: 120px auto;
+  grid-template-columns: 1fr;
+}
+
+.exception-header {
+  grid-column: 1 / span 1;
+  grid-row: 1 / span 1;
+
+  display: flex;
+  align-items: center;
+  padding: 32px;
+
+  svg {
+    height: 55px;
+    width: 170px;
+  }
+
+}
+
+.exception-content {
+  grid-column: 1 / span 1;
+  grid-row: 1 / span 2;
+  height: 100vh;
+
+  display: flex;
+  justify-content: center;
+  align-items: center;
+
+
+  .container {
+    max-width: 600px;
+  }
+
+  .image {
+    align-items: center;
+    display: flex;
+    justify-content: center;
+    margin-bottom: 2rem;
+
+    svg {
+      height: 220px;
+      width: 220px;
+    }
+  }
+
+  .main-message {
+    color: $color-black;
+    font-size: 5rem;
+    line-height: 150px;
+    text-align: center;
+  }
+
+  .desc-message {
+    color: $color-black;
+    font-size: 1.6rem;
+    font-weight: 300;
+    text-align: center;
+  }
+
+  .sign-info {
+    margin-top: 20px;
+    color: $color-black;
+    font-size: 1rem;
+    font-weight: 200;
+    text-align: center;
+
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+
+    b {
+      font-weight: 400;
+    }
+
+    .btn-primary {
+      margin-top: 15px;
+    }
+  }
+}
+
diff --git a/frontend/src/app/main.cljs b/frontend/src/app/main.cljs
index 2498735e3..56508548a 100644
--- a/frontend/src/app/main.cljs
+++ b/frontend/src/app/main.cljs
@@ -81,7 +81,7 @@
             (rt/initialize-history on-navigate))
 
   (st/emit! udu/fetch-profile)
-  (mf/mount (mf/element ui/app-wrapper) (dom/get-element "app"))
+  (mf/mount (mf/element ui/app) (dom/get-element "app"))
   (mf/mount (mf/element modal) (dom/get-element "modal")))
 
 (defn ^:export init
diff --git a/frontend/src/app/main/data/messages.cljs b/frontend/src/app/main/data/messages.cljs
index 7eb90707c..107b9e17f 100644
--- a/frontend/src/app/main/data/messages.cljs
+++ b/frontend/src/app/main/data/messages.cljs
@@ -129,3 +129,13 @@
           :actions actions
           :tag tag})))
 
+(defn assign-exception
+  [{:keys [type] :as error}]
+  (us/assert (s/nilable map?) error)
+  (us/assert (s/nilable ::us/keyword) type)
+  (ptk/reify ::assign-exception
+    ptk/UpdateEvent
+    (update [_ state]
+      (if (nil? error)
+        (dissoc state :exception)
+        (assoc state :exception error)))))
diff --git a/frontend/src/app/main/data/workspace/persistence.cljs b/frontend/src/app/main/data/workspace/persistence.cljs
index 37533024b..36db83cb4 100644
--- a/frontend/src/app/main/data/workspace/persistence.cljs
+++ b/frontend/src/app/main/data/workspace/persistence.cljs
@@ -130,13 +130,11 @@
                       (rx/map #(shapes-changes-persisted file-id %))))))
 
             on-error
-            (fn [{:keys [type status] :as error}]
-              (if (and (= :server-error type)
-                       (= 502 status))
+            (fn [{:keys [type] :as error}]
+              (if (or (= :bad-gateway type)
+                      (= :service-unavailable type))
                 (rx/of (update-persistence-status {:status :error :reason type}))
-                (rx/of update-persistence-queue
-                       (update-persistence-status {:status :error :reason type}))))]
-
+                (rx/throw error)))]
 
         (when (= file-id (:id file))
           (->> (rp/mutation :update-file params)
@@ -219,18 +217,7 @@
                    (rp/query :project {:id project-id})
                    (rp/query :file-libraries {:file-id file-id}))
            (rx/first)
-           (rx/map (fn [bundle] (apply bundle-fetched bundle)))
-           (rx/catch (fn [{:keys [type code] :as error}]
-                       (cond
-                         (= :not-found type)
-                         (rx/of (rt/nav' :not-found))
-
-                         (and (= :authentication type)
-                              (= :unauthorized code))
-                         (rx/of (rt/nav' :not-authorized))
-
-                         :else
-                         (throw error))))))))
+           (rx/map (fn [bundle] (apply bundle-fetched bundle)))))))
 
 (defn- bundle-fetched
   [file users project libraries]
diff --git a/frontend/src/app/main/refs.cljs b/frontend/src/app/main/refs.cljs
index 101f8c564..635eb826f 100644
--- a/frontend/src/app/main/refs.cljs
+++ b/frontend/src/app/main/refs.cljs
@@ -31,6 +31,9 @@
 (def profile
   (l/derived :profile st/state))
 
+(def exception
+  (l/derived :exception st/state))
+
 ;; ---- Dashboard refs
 
 (def dashboard-local
diff --git a/frontend/src/app/main/repo.cljs b/frontend/src/app/main/repo.cljs
index 498d22c15..83c114e04 100644
--- a/frontend/src/app/main/repo.cljs
+++ b/frontend/src/app/main/repo.cljs
@@ -15,34 +15,32 @@
    [app.util.http-api :as http]))
 
 (defn- handle-response
-  [response]
+  [{:keys [status body] :as response}]
   (cond
-    (http/success? response)
-    (rx/of (:body response))
+    (= 204 status)
+    (rx/empty)
 
-    (= (:status response) 400)
-    (rx/throw (:body response))
+    (= 502 status)
+    (rx/throw {:type :bad-gateway})
 
-    (= (:status response) 401)
-    (rx/throw {:type :authentication
-               :code :not-authenticated})
-
-    (= (:status response) 403)
-    (rx/throw {:type :authorization
-               :code :not-authorized})
-
-    (= (:status response) 404)
-    (rx/throw (:body response))
+    (= 503 status)
+    (rx/throw {:type :service-unavailable})
 
     (= 0 (:status response))
     (rx/throw {:type :offline})
 
+    (and (= 200 status)
+         (coll? body))
+    (rx/of body)
+
+    (and (>= status 400)
+         (map? body))
+    (rx/throw body)
+
     :else
-    (rx/throw (merge {:type :server-error
-                      :status (:status response)}
-                     (:body response)))))
-
-
+    (rx/throw {:type :unexpected-error
+               :status status
+               :data body})))
 
 (defn send-query!
   [id params]
diff --git a/frontend/src/app/main/store.cljs b/frontend/src/app/main/store.cljs
index 14788dfc8..b295aee83 100644
--- a/frontend/src/app/main/store.cljs
+++ b/frontend/src/app/main/store.cljs
@@ -26,6 +26,12 @@
 (defonce state  (ptk/store {:resolve ptk/resolve}))
 (defonce stream (ptk/input-stream state))
 
+(defn ^boolean is-logged?
+  [pdata]
+  (and (some? pdata)
+       (uuid? (:id pdata))
+       (not= uuid/zero (:id pdata))))
+
 (when *assert*
   (defonce debug-subscription
     (->> stream
diff --git a/frontend/src/app/main/ui.cljs b/frontend/src/app/main/ui.cljs
index 301e6b5fd..d2e394b5e 100644
--- a/frontend/src/app/main/ui.cljs
+++ b/frontend/src/app/main/ui.cljs
@@ -28,7 +28,7 @@
    [app.main.ui.messages :as msgs]
    [app.main.ui.render :as render]
    [app.main.ui.settings :as settings]
-   [app.main.ui.static :refer [not-found-page not-authorized-page]]
+   [app.main.ui.static :as static]
    [app.main.ui.viewer :refer [viewer-page]]
    [app.main.ui.handoff :refer [handoff]]
    [app.main.ui.workspace :as workspace]
@@ -37,6 +37,7 @@
    [app.util.router :as rt]
    [cuerdas.core :as str]
    [cljs.spec.alpha :as s]
+   [cljs.pprint :refer [pprint]]
    [expound.alpha :as expound]
    [potok.core :as ptk]
    [rumext.alpha :as mf]))
@@ -81,9 +82,6 @@
      :conform {:path-params ::viewer-path-params
                :query-params ::viewer-query-params}}]
 
-   ["/not-found" :not-found]
-   ["/not-authorized" :not-authorized]
-
    (when *assert*
      ["/debug/icons-preview" :debug-icons-preview])
 
@@ -100,19 +98,15 @@
 
    ["/workspace/:project-id/:file-id" :workspace]])
 
-(mf/defc app-error
+(mf/defc on-main-error
   [{:keys [error] :as props}]
   (let [data (ex-data error)]
-    (case (:type data)
-      :not-found [:& not-found-page {:error data}]
-      (do
-        (ptk/handle-error error)
-        [:span "Internal application errror"]))))
+    (ptk/handle-error error)
+    [:span "Internal application errror"]))
 
-(mf/defc app
-  {::mf/wrap [#(mf/catch % {:fallback app-error})]}
+(mf/defc main-page
+  {::mf/wrap [#(mf/catch % {:fallback on-main-error})]}
   [{:keys [route] :as props}]
-
   [:& (mf/provider ctx/current-route) {:value route}
    (case (get-in route [:data :name])
      (:auth-login
@@ -189,67 +183,71 @@
                                 :page-id page-id
                                 :layout-name (keyword layout-name)
                                 :key file-id}])
-
-     :not-authorized
-     [:& not-authorized-page]
-
-     :not-found
-     [:& not-found-page]
-
      nil)])
 
-(mf/defc app-wrapper
+(mf/defc app
   []
-  (let [route (mf/deref refs/route)]
-    [:*
-     [:& msgs/notifications]
-     (when route
-       [:& app {:route route}])]))
+  (let [route (mf/deref refs/route)
+        edata (mf/deref refs/exception)]
+    [:& (mf/provider ctx/current-route) {:value route}
+     (if edata
+       [:& static/exception-page {:data edata}]
+       [:*
+        [:& msgs/notifications]
+        (when route
+          [:& main-page {:route route}])])]))
 
 ;; --- Error Handling
 
+;; That are special case server-errors that should be treated
+;; differently.
+(derive :not-found ::exceptional-state)
+(derive :bad-gateway ::exceptional-state)
+(derive :service-unavailable ::exceptional-state)
+
+(defmethod ptk/handle-error ::exceptional-state
+  [{:keys [status] :as error}]
+  (ts/schedule
+   (st/emitf (dm/assign-exception error))))
+
+;; We receive a explicit authentication error; this explicitly clears
+;; all profile data and redirect the user to the login page.
+(defmethod ptk/handle-error :authentication
+  [error]
+  (ts/schedule (st/emitf (logout))))
+
+;; Error that happens on an active bussines model validation does not
+;; passes an validation (example: profile can't leave a team). From
+;; the user perspective a error flash message should be visualized but
+;; user can continue operate on the application.
 (defmethod ptk/handle-error :validation
   [error]
   (ts/schedule
-   (st/emitf (dm/show {:content "Unexpected validation error (server side)."
-                       :type :error
-                       :timeout 5000})))
-  (when-let [explain (:hint-verbose error)]
-    (js/console.group "Server Error")
-    (js/console.error (if (map? error) (pr-str error) error))
-    (js/console.error explain)
-    (js/console.endGroup "Server Error")))
+   (st/emitf
+    (dm/show {:content "Unexpected validation error (server side)."
+              :type :error
+              :timeout 3000})))
 
-(defmethod ptk/handle-error :spec-validation
-  [error]
-  (ts/schedule
-   (st/emitf (dm/show {:content "Unexpected validation error (server side)."
-                       :type :error
-                       :timeout 5000})))
+  ;; Print to the console some debug info.
+  (js/console.group "Server Error")
+  (js/console.info
+   (with-out-str
+     (pprint (dissoc error :explain))))
   (when-let [explain (:explain error)]
-    (js/console.group "Server Error")
-    (js/console.error (if (map? error) (pr-str error) error))
-    (js/console.error explain)
-    (js/console.endGroup "Server Error")))
-
-
-(defmethod ptk/handle-error :authentication
-  [error]
-  (ts/schedule 0 #(st/emit! (logout))))
-
-(defmethod ptk/handle-error :authorization
-  [error]
-  (ts/schedule
-   (st/emitf (dm/show {:content "Not authorized to see this content."
-                       :timeout 2000
-                       :type :error}))))
+    (js/console.error explain))
+  (js/console.endGroup "Server Error"))
 
+;; This is a pure frontend error that can be caused by an active
+;; assertion (assertion that is preserved on production builds). From
+;; the user perspective this should be treated as internal error.
 (defmethod ptk/handle-error :assertion
   [{:keys [data stack message context] :as error}]
   (ts/schedule
-   (st/emitf (dm/show {:content "Internal assertion error."
+   (st/emitf (dm/show {:content "Internal error: assertion."
                        :type :error
-                       :timeout 2000})))
+                       :timeout 3000})))
+
+  ;; Print to the console some debugging info
   (js/console.group message)
   (js/console.info (str/format "ns: '%s'\nname: '%s'\nfile: '%s:%s'"
                                 (:ns context)
@@ -259,48 +257,49 @@
   (js/console.groupCollapsed "Stack Trace")
   (js/console.info stack)
   (js/console.groupEnd "Stack Trace")
-
   (js/console.error (with-out-str (expound/printer data)))
   (js/console.groupEnd message))
 
+;; This happens when the backed server fails to process the
+;; request. This can be caused by an internal assertion or any other
+;; uncontrolled error.
+(defmethod ptk/handle-error :server-error
+  [{:keys [data] :as error}]
+  (ts/schedule
+   (st/emitf (dm/show
+              {:content "Something wrong has happened (on backend)."
+               :type :error
+               :timeout 3000})))
+  (js/console.group "Internal Server Error:")
+  (js/console.error "hint:" (or (:hint data) (:message data)))
+  (js/console.info
+   (with-out-str
+     (pprint (dissoc data :explain))))
+  (when-let [explain (:explain data)]
+    (js/console.error explain))
+  (js/console.groupEnd "Internal Server Error:"))
+
 (defmethod ptk/handle-error :default
   [error]
   (if (instance? ExceptionInfo error)
     (ptk/handle-error (ex-data error))
     (do
-      (js/console.group "Generic Error")
+      (ts/schedule
+       (st/emitf (dm/show
+                  {:content "Something wrong has happened."
+                   :type :error
+                   :timeout 3000})))
+
+      (js/console.group "Internal error:")
       (js/console.log "hint:" (or (ex-message error)
                                   (:hint error)
                                   (:message error)))
       (ex/ignoring
        (js/console.error "repr: " (pr-str error))
+       (js/console.error "data: " (clj->js error))
        (js/console.error "stack:" (.-stack error)))
-      (js/console.groupEnd "Generic error")
-      (ts/schedule (st/emitf (dm/show
-                              {:content "Something wrong has happened."
-                               :type :error
-                               :timeout 3000}))))))
+      (js/console.groupEnd "Internal error:"))))
 
-(defmethod ptk/handle-error :server-error
-  [{:keys [status] :as error}]
-  (cond
-    (= status 429)
-    (ts/schedule
-     (st/emitf (dm/show {:content "Too many requests, wait a little bit and retry."
-                         :type :error
-                         :timeout 5000})))
-
-    :else
-    (ts/schedule
-     (st/emitf (dm/show {:content "Unable to connect to backend, wait a little bit and refresh."
-                         :type :error})))))
-
-
-(defmethod ptk/handle-error :not-found
-  [{:keys [status] :as error}]
-  (ts/schedule
-   (st/emitf (dm/show {:content "Resource not found."
-                       :type :warning}))))
 
 (defonce uncaught-error-handler
   (letfn [(on-error [event]
diff --git a/frontend/src/app/main/ui/static.cljs b/frontend/src/app/main/ui/static.cljs
index 7e097168a..ac00e1e7e 100644
--- a/frontend/src/app/main/ui/static.cljs
+++ b/frontend/src/app/main/ui/static.cljs
@@ -11,27 +11,104 @@
   (:require
    [cljs.spec.alpha :as s]
    [rumext.alpha :as mf]
+   [app.main.ui.context :as ctx]
+   [app.main.data.auth :as da]
+   [app.main.data.messages :as dm]
+   [app.main.store :as st]
+   [app.main.refs :as refs]
+   [cuerdas.core :as str]
+   [app.util.i18n :refer [tr]]
+   [app.util.router :as rt]
    [app.main.ui.icons :as i]))
 
-(mf/defc not-found-page
-  [{:keys [error] :as props}]
-  [:section.not-found-layout
-   [:div.not-found-header i/logo]
-   [:div.not-found-content
-    [:div.message-container
-     [:div.error-img i/icon-empty]
-     [:div.main-message "404"]
-     [:div.desc-message "Oops! Page not found"]
-     [:a.btn-primary.btn-small "Go back"]]]])
+(defn- go-to-dashboard
+  [profile]
+  (let [team-id (:default-team-id profile)]
+    (st/emit! (rt/nav :dashboard-projects {:team-id team-id}))))
 
-(mf/defc not-authorized-page
+(mf/defc not-found
   [{:keys [error] :as props}]
-  [:section.not-found-layout
-   [:div.not-found-header i/logo]
-   [:div.not-found-content
-    [:div.message-container
-     [:div.error-img i/icon-lock]
-     [:div.main-message "403"]
-     [:div.desc-message "Sorry, you are not authorized to access this page."]
-     #_[:a.btn-primary.btn-small "Go back"]]]])
+  (let [profile (mf/deref refs/profile)]
+    [:section.exception-layout
+     [:div.exception-header
+      {:on-click (partial go-to-dashboard profile)}
+      i/logo]
+     [:div.exception-content
+      [:div.container
+       [:div.image i/icon-empty]
+       [:div.main-message (tr "labels.not-found.main-message")]
+       [:div.desc-message (tr "labels.not-found.desc-message")]
+       [:div.sign-info
+        [:span (tr "labels.not-found.auth-info") " " [:b (:email profile)]]
+        [:a.btn-primary.btn-small
+         {:on-click (st/emitf (da/logout))}
+         (tr "labels.sign-out")]]]]]))
+
+(mf/defc bad-gateway
+  [{:keys [error] :as props}]
+  (let [profile (mf/deref refs/profile)]
+    [:section.exception-layout
+     [:div.exception-header
+      {:on-click (partial go-to-dashboard profile)}
+      i/logo]
+     [:div.exception-content
+      [:div.container
+       [:div.image i/icon-empty]
+       [:div.main-message (tr "labels.bad-gateway.main-message")]
+       [:div.desc-message (tr "labels.bad-gateway.desc-message")]
+       [:div.sign-info
+        [:a.btn-primary.btn-small
+         {:on-click (st/emitf #(dissoc % :exception))}
+         (tr "labels.retry")]]]]]))
+
+(mf/defc service-unavailable
+  [{:keys [error] :as props}]
+  (let [profile (mf/deref refs/profile)]
+    [:section.exception-layout
+     [:div.exception-header
+      {:on-click (partial go-to-dashboard profile)}
+      i/logo]
+     [:div.exception-content
+      [:div.container
+       [:div.image i/icon-empty]
+       [:div.main-message (tr "labels.service-unavailable.main-message")]
+       [:div.desc-message (tr "labels.service-unavailable.desc-message")]
+       [:div.sign-info
+        [:a.btn-primary.btn-small
+         {:on-click (st/emitf #(dissoc % :exception))}
+         (tr "labels.retry")]]]]]))
+
+(mf/defc internal-error
+  [props]
+  (let [profile (mf/deref refs/profile)]
+    [:section.exception-layout
+     [:div.exception-header
+      {:on-click (partial go-to-dashboard profile)}
+      i/logo]
+     [:div.exception-content
+      [:div.container
+       [:div.image i/icon-empty]
+       [:div.main-message "Internal Error"]
+       [:div.desc-message "Something bad happended on backend servers. Please retry the operation and if the problem persists, contact with support."]
+       [:div.sign-info
+        [:a.btn-primary.btn-small
+         {:on-click (st/emitf (dm/assign-exception nil))}
+         (tr "labels.retry")]]]]]))
+
+(mf/defc exception-page
+  [{:keys [data] :as props}]
+  (case (:type data)
+    :not-found
+    [:& not-found]
+
+    :bad-gateway
+    [:& bad-gateway]
+
+    :service-unavailable
+    [:& service-unavailable]
+
+    :server-error
+    [:& internal-error]
+
+    nil))
 
diff --git a/frontend/src/app/util/router.cljs b/frontend/src/app/util/router.cljs
index a96bb4f90..107f22e48 100644
--- a/frontend/src/app/util/router.cljs
+++ b/frontend/src/app/util/router.cljs
@@ -10,15 +10,15 @@
 (ns app.util.router
   (:refer-clojure :exclude [resolve])
   (:require
+   [app.common.data :as d]
+   [app.config :as cfg]
+   [app.util.browser-history :as bhistory]
+   [app.util.timers :as ts]
    [beicon.core :as rx]
    [cuerdas.core :as str]
    [goog.events :as e]
    [potok.core :as ptk]
-   [reitit.core :as r]
-   [app.common.data :as d]
-   [app.config :as cfg]
-   [app.util.browser-history :as bhistory]
-   [app.util.timers :as ts])
+   [reitit.core :as r])
   (:import
    goog.Uri
    goog.Uri.QueryData))
@@ -92,6 +92,10 @@
 ;; --- Navigate (Event)
 
 (deftype Navigate [id params qparams replace]
+  ptk/UpdateEvent
+  (update [_ state]
+    (dissoc state :exception))
+
   ptk/EffectEvent
   (effect [_ state stream]
     (let [router  (:router state)