Hello! I've been having an issue where every time I try to save the settings on a specific model I want to upload I get an error saying that something went wrong and the materials couldn't be saved. I then tried publishing in the hopes that the materials would be saved when I published and that proved to be unsuccessful. My model has 5-6 material groups, and the textures are 4k, but I've also tested this with lower res textures and got the same result. I don't know why it only happens with this specific model. Can someone please help me understand what I might be doing wrong?
You can find the model here: https://skfb.ly/68VyP. The thumbnail is what it looks like with all the materials applied, but it always loads white.