Fatal error: Uncaught Error: Class "Wikibase\Repo\Dumpers\DumpGenerator" not found in /var/www/html/w/extensions/Wikibase/repo/includes/Dumpers/JsonDumpGenerator.php:30 Stack trace: #0 {main} thrown in /var/www/html/w/extensions/Wikibase/repo/includes/Dumpers/JsonDumpGenerator.php on line 30