Fatal error: Uncaught Error: Interface "ILIAS\UI\Component\Table\DataRetrieval" not found in /var/www/html/ilias/components/ILIAS/Chatroom/classes/Bans/BannedUsersTable.php:34 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Chatroom/classes/Bans/BannedUsersTable.php on line 34