Fatal error: Uncaught Error: Class "MediaWiki\Api\ApiBase" not found in C:\xampp\htdocs\extensions\VisualEditor\editcheck\includes\ApiEditCheckReferenceUrl.php:13 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\VisualEditor\editcheck\includes\ApiEditCheckReferenceUrl.php on line 13