web/user: fix user settings stuck loading

closes #4297

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

web/src/user/user-settings/details/UserSettingsFlowExecutor.ts

@@ -98,6 +98,7 @@ export class UserSettingsFlowExecutor extends AKElement implements StageHost {
             if (!this.flowSlug) {
                 return;
             }
+            this.nextChallenge();
         });
     }