Fatal error: Uncaught Error: Interface "ILIAS\FileDelivery\ilFileDeliveryType" not found in /var/www/html/ilias/components/ILIAS/FileDelivery/classes/FileDeliveryTypes/PHPChunked.php:35 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/FileDelivery/classes/FileDeliveryTypes/PHPChunked.php on line 35