Fatal error: Uncaught Error: Class "OCP\AppFramework\Db\QBMapper" not found in /home/tzuovhm/tzuovhm/apps_/oauth2/lib/Db/AccessTokenMapper.php:23 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps_/oauth2/lib/Db/AccessTokenMapper.php on line 23