Fatal error: Uncaught Error: Interface "ILIAS\MetaData\Elements\Base\BaseElementInterface" not found in /var/www/html/ilias/components/ILIAS/MetaData/classes/Elements/Base/BaseElement.php:27 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/MetaData/classes/Elements/Base/BaseElement.php on line 27