Fatal error: Uncaught Error: Interface "ILIAS\UI\Component\Link\IsRelationship" not found in /var/www/html/ilias/components/ILIAS/UI/src/Component/Link/Relationship.php:28 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/UI/src/Component/Link/Relationship.php on line 28