Fatal error: Uncaught Error: Class "ilXmlWriter" not found in /var/www/html/ilias/components/ILIAS/MetaData/classes/class.ilMD2XML.php:32 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/MetaData/classes/class.ilMD2XML.php on line 32