Fatal error: Uncaught Error: Class "MediaWiki\Extension\Math\InputCheck\BaseChecker" not found in /home/floten1/q.tenbergen.ca/extensions/Math/src/InputCheck/RestbaseChecker.php:21 Stack trace: #0 {main} thrown in /home/floten1/q.tenbergen.ca/extensions/Math/src/InputCheck/RestbaseChecker.php on line 21