Fatal error: Uncaught Error: Class 'OCP\AppFramework\Db\Mapper' not found in /home/mattiapa/cloud2.mprnl.fr/owncloud/apps/workflow/lib/Entity/PropertyMapper.php:31 Stack trace: #0 {main} thrown in /home/mattiapa/cloud2.mprnl.fr/owncloud/apps/workflow/lib/Entity/PropertyMapper.php on line 31