Fatal error: Uncaught Error: Class "humhub\components\Controller" not found in /users/quirl/www/filemanager/spark/protected/humhub/modules/notification/controllers/OverviewController.php:28 Stack trace: #0 {main} thrown in /users/quirl/www/filemanager/spark/protected/humhub/modules/notification/controllers/OverviewController.php on line 28