Fatal error: Uncaught Error: Class "ILIAS\Repository\Form\FormAdapterGUI" not found in /var/www/html/ilias/components/ILIAS/BookingManager/Service/Form/FormAdapterGUI.php:26 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/BookingManager/Service/Form/FormAdapterGUI.php on line 26