Fatal error: Uncaught Error: Class "MediaWiki\SpecialPage\FormSpecialPage" not found in /var/www/html/extensions/CiteThisPage/includes/SpecialCiteThisPage.php:15 Stack trace: #0 {main} thrown in /var/www/html/extensions/CiteThisPage/includes/SpecialCiteThisPage.php on line 15