Fatal error: Uncaught Error: Class "MediaWiki\SpecialPage\QueryPage" not found in C:\xampp\htdocs\extensions\Gadgets\includes\Special\SpecialGadgetUsage.php:41 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\Gadgets\includes\Special\SpecialGadgetUsage.php on line 41