Fatal error: Uncaught Error: Interface "ILIAS\MetaData\Services\Search\SearcherInterface" not found in /var/www/html/ilias/components/ILIAS/MetaData/classes/Services/Search/Searcher.php:31 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/MetaData/classes/Services/Search/Searcher.php on line 31