Fatal error: Uncaught Error: Class "OCP\AppFramework\Db\QBMapper" not found in /home/tzuovhm/tzuovhm/apps_/mail/lib/Db/TrustedSenderMapper.php:18
Stack trace:
#0 {main}
thrown in /home/tzuovhm/tzuovhm/apps_/mail/lib/Db/TrustedSenderMapper.php on line 18