Fatal error: Uncaught Error: Class "MediaWiki\Auth\AbstractSecondaryAuthenticationProvider" not found in C:\xampp\htdocs\extensions\OATHAuth\src\Auth\SecondaryAuthenticationProvider.php:15 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\OATHAuth\src\Auth\SecondaryAuthenticationProvider.php on line 15