Fatal error: Uncaught Error: Class "MediaWiki\SpecialPage\UnlistedSpecialPage" not found in /var/www/html/extensions/MobileFrontend/includes/specials/SpecialMobileDiff.php:8 Stack trace: #0 {main} thrown in /var/www/html/extensions/MobileFrontend/includes/specials/SpecialMobileDiff.php on line 8