Bentley Learn Server - Layout Simple Site

I am working through learning Subsurface Utilities Applications.

One of the modules I am working through is "Laying Out a Simple Site".

I have followed the pdf and the on-demand videos and I encounter a problem when I try to Compute I am supposed to "Click No." and then the claculations are run on all the structures in the scenario.

Here is the problem - Rather that getting the GVF Report as the training modules directs me to suspect, I get this error:

Can I get some guidance on why I am not tracking with the PDF or the module videos at this point?