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