Print Web Map image in Map Picture Box in GCX Reporting5 from a server-side GCX Workflow5

I have a client-side Workflow that needs to pass info to a server-side Workflow to Run Report. But I need an image of the web map from the client. Is this possible?

In the Client Workflow I use "Generate Webmap for Report", and then pass that to the server-side Workflow as an argument to "Run Workflow", e.g. = {  webmapParameters: $webmapForReport1.result }. In the server-side Workflow I use "Get Workflow Inputs" and then use "Run Report", and set the Web Map Parameters = $getWorkflowInputs1.inputs.webmapParameters. It just prints out the default web map of Los Angeles.

Any ideas on how to get this to work. Or different ideas on how to do it?