Add filter to wait for user key availabilty before decrypting folders (#15645)

libs/common/src/vault/services/folder/folder.service.ts

@@ -1,6 +1,16 @@
 // FIXME: Update this file to be type safe and remove this and next line
 // @ts-strict-ignore
-import { Observable, Subject, firstValueFrom, map, shareReplay, switchMap, merge } from "rxjs";
+import {
+  Observable,
+  Subject,
+  firstValueFrom,
+  map,
+  shareReplay,
+  switchMap,
+  merge,
+  filter,
+  combineLatest,
+} from "rxjs";
 
 // This import has been flagged as unallowed for this class. It may be involved in a circular dependency loop.
 // eslint-disable-next-line no-restricted-imports
@@ -69,8 +79,12 @@ export class FolderService implements InternalFolderServiceAbstraction {
 
       const observable = merge(
         this.forceFolderViews[userId],
-        this.encryptedFoldersState(userId).state$.pipe(
+        combineLatest([
-          switchMap((folderData) => {
+          this.encryptedFoldersState(userId).state$,
+          this.keyService.userKey$(userId),
+        ]).pipe(
+          filter(([folderData, userKey]) => folderData != null && userKey != null),
+          switchMap(([folderData, _]) => {
             return this.decryptFolders(userId, folderData);
           }),
         ),