Fatal error: Uncaught Error: Interface "ilCtrlBaseClassInterface" not found in /var/www/html/ilias/components/ILIAS/Exercise/classes/class.ilExerciseHandlerGUI.php:24 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Exercise/classes/class.ilExerciseHandlerGUI.php on line 24