Fatal error: Uncaught Error: Interface "Wikibase\Lib\Store\EntityExistenceChecker" not found in /var/www/html/w/extensions/Wikibase/repo/includes/FederatedProperties/ApiEntityExistenceChecker.php:15 Stack trace: #0 {main} thrown in /var/www/html/w/extensions/Wikibase/repo/includes/FederatedProperties/ApiEntityExistenceChecker.php on line 15