Fatal error: Uncaught Error: Class "OCA\WorkflowEngine\Check\AbstractStringCheck" not found in /home/.sites/740/site1364/web/cloud/-/apps/workflowengine/lib/Check/FileMimeType.php:30
Stack trace:
#0 {main}
  thrown in /home/.sites/740/site1364/web/cloud/-/apps/workflowengine/lib/Check/FileMimeType.php on line 30