Fatal error: Uncaught Error: Class "ilXmlWriter" not found in /var/www/html/ilias/components/ILIAS/AdvancedMetaData/classes/Record/class.ilAdvancedMDRecordXMLWriter.php:30 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/AdvancedMetaData/classes/Record/class.ilAdvancedMDRecordXMLWriter.php on line 30