Receiving following error on chatter approvals for Cas object
Challenge not yet complete... here's what's wrong: 
There was an unexpected error in your org which is preventing this assessment check from completing: System.DmlException: Process failed. First exception on row 0; first error: REQUIRED_FIELD_MISSING, missing required field: [nextApproverIds]: [nextApproverIds]
I do not have a clue as to missing information. This was a very confusing exercise for me. Newbie I am