Fatal error: Uncaught Error: Class "OCA\WorkflowEngine\Check\AbstractStringCheck" not found in /home/tzuovhm/tzuovhm/apps/workflowengine/lib/Check/FileName.php:18 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps/workflowengine/lib/Check/FileName.php on line 18