Fatal error: Uncaught Error: Class "MediaWiki\Extension\DiscussionTools\LanguageData" not found in C:\xampp\htdocs\extensions\DiscussionTools\tests\phpunit\MockLanguageData.php:7 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\DiscussionTools\tests\phpunit\MockLanguageData.php on line 7