Screen goes white when applying a material - Rhino 6

When applying materials in render mode, rhino 6 the object goes white as the original background. How could I possibly fix it?

Would be good to post the results of the Rhino command _SystemInfo. This sounds like driver problems, but hard to tell without more information.

This is with the Rendered mode, right?

I think is for the skylight, try disabling it from the render panel on the right