Sketchup 2015 not filling colors

I have a student who has used sketchup before and had no problem using the fill bucket to add color to drawings. But now it will not fill with color, it looks like nothing happens, but the fill can be undone under the Edit Heading. I have checked, but can not find the issue. He has tried on several network computers. Any ideas?

Did he changed the face style to “Hidden Line”?

Or Monochrome?

And some gibberish to fill the 20 characters