Fatal error: Uncaught Error: Class "humhub\components\SocialActivity" not found in /users/quirl/www/filemanager/spark/protected/humhub/modules/notification/components/BaseNotification.php:45 Stack trace: #0 {main} thrown in /users/quirl/www/filemanager/spark/protected/humhub/modules/notification/components/BaseNotification.php on line 45