I'm new to Sketchfab, and loving it!
It has all been too easy, but suddenly my last few exports from Sketchup appear in Sketchfab completely white, however, coloured on the underside (where there is nothing to see!) I don't think I've changed any settings, or moved my model, but I've been trying everything and can't figure it out!
You can see it here:
Early export with no issue: https://sketchfab.com/models/9940876a56024f0eb22fc379e6edb7d7
Last export: https://sketchfab.com/models/6d6ad94aefd445c991be8ff530c680e8
Any suggestions would be much appreciated!