Fatal error: Uncaught Error: Class "ilSingleChoiceWizardInputGUI" not found in /var/www/html/ilias/components/ILIAS/TestQuestionPool/classes/class.ilEssayKeywordWizardInputGUI.php:19 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/TestQuestionPool/classes/class.ilEssayKeywordWizardInputGUI.php on line 19