Fatal error: Uncaught Error: Class "OCA\Mail\Exception\ServiceException" not found in /home/tzuovhm/tzuovhm/apps_/mail/lib/Exception/UploadException.php:12 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps_/mail/lib/Exception/UploadException.php on line 12