fix(frontend): redirect user to DEFAULT_FALLBACK_URL when permissions update fails after PERMISSIONS_UPDATED message

Fixes #6475

Signed-off-by: Philip Molares <philip.molares@udo.edu>

frontend/src/components/editor-page/editor-pane/hooks/yjs/use-on-permissions-updated.ts

@@ -9,6 +9,11 @@ import type { MessageTransporter } from '@hedgedoc/commons'
 import { MessageType } from '@hedgedoc/commons'
 import type { Listener } from 'eventemitter2'
 import { useEffect } from 'react'
+import { Logger } from '../../../../../utils/logger'
+import { DEFAULT_FALLBACK_URL } from '../../../../login-page/utils/use-get-post-login-redirect-url'
+import { useRouter } from 'next/navigation'
+
+const logger = new Logger('useOnPermissionsUpdated')
 
 /**
  * Hook that updates the permissions state in the redux if the server announced an update of the note permissions.
@@ -17,14 +22,18 @@ import { useEffect } from 'react'
  */
 export const useOnPermissionsUpdated = (websocketConnection: MessageTransporter): void => {
   const { showErrorNotificationBuilder } = useUiNotifications()
+  const router = useRouter()
 
   useEffect(() => {
     const listener = websocketConnection.on(
       MessageType.PERMISSIONS_UPDATED,
       () => {
-        updateNotePermissions().catch(
-          showErrorNotificationBuilder('common.errorWhileLoading', { name: 'note permission update' })
-        )
+        updateNotePermissions().catch(() => {
+          logger.error(
+            `Got an error while updating note permissions after receiving ${MessageType.PERMISSIONS_UPDATED}. Returning the user to explore page`
+          )
+          router.replace(DEFAULT_FALLBACK_URL)
+        })
       },
       {
         objectify: true
@@ -33,5 +42,5 @@ export const useOnPermissionsUpdated = (websocketConnection: MessageTransporter)
     return () => {
       listener.off()
     }
-  }, [showErrorNotificationBuilder, websocketConnection])
+  }, [showErrorNotificationBuilder, websocketConnection, router])
 }