Fatal error: Uncaught Error: Class "XMLWriter" not found in /var/www/html/AAU-ID/vendor/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Builder/Xml.php:7 Stack trace: #0 {main} thrown in /var/www/html/AAU-ID/vendor/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/Builder/Xml.php on line 7