diff --git a/.gitignore b/.gitignore
index 7f0c6c5d1..cf1a6e29b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,7 +19,7 @@
 Thumbs.db
 # Virtual Environment
 .virtualenv*/*
-.venv/*
+.venv
 server/.venv
 
 ## Compatibility
diff --git a/client/src/app/core/repositories/users/user-repository.service.ts b/client/src/app/core/repositories/users/user-repository.service.ts
index 0912b3455..6fdbdafb7 100644
--- a/client/src/app/core/repositories/users/user-repository.service.ts
+++ b/client/src/app/core/repositories/users/user-repository.service.ts
@@ -500,6 +500,9 @@ export class UserRepositoryService extends BaseRepository<ViewUser, User, UserTi
     }
 
     private preventAlterationOnDemoUsers(users: ViewUser | ViewUser[]): void {
+        if (!this.demoModeUserIds) {
+            return;
+        }
         if (Array.isArray(users)) {
             if (users.map(user => user.id).intersect(this.demoModeUserIds).length > 0) {
                 this.preventInDemo();
diff --git a/client/src/app/core/ui-services/load-font.service.ts b/client/src/app/core/ui-services/load-font.service.ts
index b25260844..8b1fa3037 100644
--- a/client/src/app/core/ui-services/load-font.service.ts
+++ b/client/src/app/core/ui-services/load-font.service.ts
@@ -68,6 +68,9 @@ export class LoadFontService {
      */
     private setCustomProjectorFont(font: any, weight: number): void {
         const path = font.path ? font.path : font.default;
+        if (!path) {
+            return;
+        }
         const url = font.path ? `${this.urlPrefix}${path}` : path;
         const fontFace = new FontFace('customProjectorFont', `url(${url})`, { weight: weight });
         fontFace
diff --git a/client/src/app/core/ui-services/voting.service.ts b/client/src/app/core/ui-services/voting.service.ts
index 9930af398..0af871c12 100644
--- a/client/src/app/core/ui-services/voting.service.ts
+++ b/client/src/app/core/ui-services/voting.service.ts
@@ -43,10 +43,11 @@ export class VotingService {
      * @returns null if no errors exist (= user can vote) or else a VotingError
      */
     public getVotePermissionError(poll: ViewBasePoll): VotingError | void {
-        const user = this.operator.viewUser;
         if (this.operator.isAnonymous) {
             return VotingError.USER_IS_ANONYMOUS;
         }
+
+        const user = this.operator.user;
         if (!poll.groups_id.intersect(user.groups_id).length) {
             return VotingError.USER_HAS_NO_PERMISSION;
         }