Custom Resource not deploying Error 500

I was trying to make a simple custom resource in vra8.1 that does nothing except run a workflow and continue (just learning).

I keep getting this error:

Failed to get request status: 500 Internal Server Error from POST http://tango-vro-gateway.prelude.svc.cluster.local:8080/vro/blueprint/blueprint-provider-request?operation=status (InternalServerError)

I see the vro workflow run and complete but still get the error.  The workflow takes in one string var and returns a string

Am I misunderstanding this?

IdeaS?