Hi Peter,
I’m assuming that this is on Processing 3.5.3?
To confirm: basic 2D (not P2D) examples are working for you, and other P3D examples are not. Is that right?
Can anyone with a Win7 PC try running the SphereGeometry extension and confirm that it is working for them? I don’t have any version of Windows right now, so I can’t provide direct advice for problems on Windows.