Hi
Wonder why thePurchase Invoice Approval workflow gave the following error even thought i have enabled the Purchase Invoice Workflow and the User Approval Setup

This is how I set up the Purchase Invoice Workflow

The User Approval Setup is as follows:

The Purchase Invoice for 1 item with the Purchase Code same as the User Approval Setup.

When click on the Request Approval>Send Request Approval, it gives the following error.

Please advice where did I go wrong.
Thanks in advance.
Rgds
YC