Fatal error: Uncaught Error: Class "MediaWiki\ResourceLoader\WikiModule" not found in /var/www/html/orian-wiki/extensions/Gadgets/includes/GadgetResourceLoaderModule.php:12 Stack trace: #0 {main} thrown in /var/www/html/orian-wiki/extensions/Gadgets/includes/GadgetResourceLoaderModule.php on line 12