In the Account Coding workflow, when clicked on Return, it is giving an Error

Summary:

We have a requirement to return the Account Coding workflow to the Creator but it is giving an error when we try to return it to the creator. So wanted to understand the purpose of this functionality with a test case.

Content (required):

In the Accounts Payables Invoices, we have a situation where a Invoice Creator does not know the Distribution code, so he opts for the Account Coding Workflow approval.

When the workflow is initiated and the relevant coder gets the invoice to code the distributions, for some reason he has to Return it back, but when clicking on the Submit button for Return, it is giving an error, as below.