Fatal error: Uncaught Error: Class "MediaWiki\Api\ApiBase" not found in C:\xampp\htdocs\extensions\OATHAuth\src\Api\Module\ApiOATHValidate.php:37 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\OATHAuth\src\Api\Module\ApiOATHValidate.php on line 37