Fatal error: Uncaught Error: Interface "ILIAS\COPage\Editor\Server\QueryActionHandler" not found in /var/www/html/ilias/components/ILIAS/COPage/Page/class.PageQueryActionHandler.php:30 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/COPage/Page/class.PageQueryActionHandler.php on line 30