Could not find user at SysWorkflowDueDateProvider Error in Workflow axapta MSDAX

If you are getting below error on workflow .

Stopped (error): X++ Exception: Could not find user at SysWorkflowDueDateProvider-resolve SysWorkflowDueDateProvider-resolveDueDate

Then you need to check following things.

1. Check workflow configuration is user assigned for workflow approval elements .
2. Check user relation form if there is not employee assigned then you need to assign employee on user relation form.