Fatal error: Uncaught Error: Class "humhub\modules\activity\components\BaseActivity" not found in /users/quirl/www/filemanager/spark/protected/runtime/module_backups/calendar_1742577949/activities/ResponseAttend.php:20 Stack trace: #0 {main} thrown in /users/quirl/www/filemanager/spark/protected/runtime/module_backups/calendar_1742577949/activities/ResponseAttend.php on line 20