Fatal error: Uncaught Error: Class "Horde_Mime_Headers_Element_Single" not found in /home/edepracl/public_html/moodle30/lib/horde/framework/Horde/Mime/Headers/ContentId.php:24 Stack trace: #0 {main} thrown in /home/edepracl/public_html/moodle30/lib/horde/framework/Horde/Mime/Headers/ContentId.php on line 24