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