Fatal error: Uncaught Error: Class "MediaWiki\Extension\Math\InputCheck\BaseChecker" not found in /var/www/html/orian-wiki/extensions/Math/src/InputCheck/RestbaseChecker.php:17 Stack trace: #0 {main} thrown in /var/www/html/orian-wiki/extensions/Math/src/InputCheck/RestbaseChecker.php on line 17