Fatal error: Uncaught Error: Class "MediaWiki\Languages\LanguageNameUtils" not found in /var/www/html/w/tests/phpunit/unit/includes/Language/LanguageNameUtilsTestTrait.php:11 Stack trace: #0 {main} thrown in /var/www/html/w/tests/phpunit/unit/includes/Language/LanguageNameUtilsTestTrait.php on line 11