Fatal error: Uncaught Error: Interface "ilContentPageObjectConstants" not found in /var/www/html/ilias/components/ILIAS/ContentPage/classes/class.ilContentPagePageCommandForwarder.php:26 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/ContentPage/classes/class.ilContentPagePageCommandForwarder.php on line 26