Fatal error: Uncaught Error: Class "humhub\modules\calendar\notifications\base\EventNotification" not found in /users/quirl/www/filemanager/old spark/old -protected/runtime/module_backups/calendar_1736926948/notifications/ParticipantAdded.php:15 Stack trace: #0 {main} thrown in /users/quirl/www/filemanager/old spark/old -protected/runtime/module_backups/calendar_1736926948/notifications/ParticipantAdded.php on line 15