Fatal error: Uncaught Error: Interface "ILIAS\TestQuestionPool\Questions\Question" not found in /var/www/html/ilias/components/ILIAS/TestQuestionPool/src/Questions/QuestionPartiallySaveable.php:21 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/TestQuestionPool/src/Questions/QuestionPartiallySaveable.php on line 21