Fatal error: Uncaught Error: Interface "ilCtrlBaseClassInterface" not found in /var/www/html/ilias/components/ILIAS/Tagging/classes/class.ilTaggingSlateContentGUI.php:29 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Tagging/classes/class.ilTaggingSlateContentGUI.php on line 29