Fatal error: Uncaught Error: Class "MediaWiki\SpecialPage\SpecialPage" not found in C:\xampp\htdocs\extensions\VisualEditor\includes\SpecialCollabPad.php:24 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\VisualEditor\includes\SpecialCollabPad.php on line 24