Fatal error: Uncaught Error: Class "MediaWiki\SpecialPage\SpecialPage" not found in /var/www/html/extensions/UploadWizard/includes/Specials/SpecialCampaigns.php:10 Stack trace: #0 {main} thrown in /var/www/html/extensions/UploadWizard/includes/Specials/SpecialCampaigns.php on line 10