Unable to complete badge for "Build a Discount Approval Process"

For the "Specify Final Approval and Rejection Actions" chapter, I get the following error message when trying to verify the step: "The final approval is not configured correctly for 'Discount Approval Process'. Approving the opportunity did set the opportunity's Approval_Status__c field value to 'Approved'."  The error message in itself is confusing and I've seen someone having a similar issue which was apparently fixed by trying in a new environment. I tried to do the same thing but I got the same error again even though the Approval/Rejection Actions are all set up just as they should.

 Any suggestion? Thanks in advance!