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