Fatal error: Uncaught Error: Class "ilBuddySystemException" not found in /var/www/html/ilias/components/ILIAS/Contact/BuddySystem/exceptions/class.ilBuddySystemRelationStateException.php:25 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Contact/BuddySystem/exceptions/class.ilBuddySystemRelationStateException.php on line 25