Fatal error: Uncaught Error: Interface "ILIAS\UI\Component\Table\DataRetrieval" not found in /var/www/html/ilias/components/ILIAS/Calendar/classes/ConsultationHours/BookingTableGUI.php:38 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Calendar/classes/ConsultationHours/BookingTableGUI.php on line 38