Fatal error: Uncaught Error: Class "ilMailNotification" not found in /var/www/html/ilias/components/ILIAS/Forum/classes/Notification/class.ilForumMailEventNotificationSender.php:24 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Forum/classes/Notification/class.ilForumMailEventNotificationSender.php on line 24