Fatal error: Uncaught Error: Interface "ilUsersGalleryCollectionProvider" not found in /var/www/html/ilias/components/ILIAS/User/classes/Gallery/class.ilAbstractUsersGalleryCollectionProvider.php:21 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/User/classes/Gallery/class.ilAbstractUsersGalleryCollectionProvider.php on line 21