Workflow Assignment Error

Hi all,

In workflow configuration, there is an element with assignment type hierarchy.For example, this element assigned to position title=IT manager. And hierarchy options = Assign to all user retrieved.

If IT manager himself creates a PR and submit it, an error occured:

Stopped (error): X++ Exception: User not found
at SysWorkflowHierarchyProvider-resolve

How can I configure the workflow for the employee who submits it, and the same time whom assigned to.

Best regards,

Sefa Duman