Fatal error: Uncaught Error: Class "MediaWiki\Api\ApiQueryBase" not found in /usr/www/otte/public/sphunt1/extensions/Gadgets/includes/Api/ApiQueryGadgetCategories.php:33 Stack trace: #0 {main} thrown in /usr/www/otte/public/sphunt1/extensions/Gadgets/includes/Api/ApiQueryGadgetCategories.php on line 33