"Failed to load model, could not create mesh from file" error

I just recently started trying my hand at importing player models to Tower Unite, but unfortunately even after getting every other issue out of the way I’m stuck on this one: “Failed to load model, could not create mesh from file”.
I downloaded the old example Dave model from v1.0 guide (Don’t worry, I was using the v3.0 guide to make my own) just to see, and it also creates the same error message?


I couldn’t find anyone posting about this error and I’m completely stumped as to what to do.