Surface will not load into GH

Surface will not accept an extruded surface I made in Rhino. No problem if I extrude the same curve using GH. Am I doing something wrong? I tried capping the surface and that does not work either. Attaching the rhino and GH file. The error I get is "surface failed to load" (1.8 KB)
Extrusion.3dm (38.7 KB)

You can either use ConvertExtrusion before giving it GH or use a Brep component first:

Thanks!! I was concerned that this might be a bug.

Rick Paul