I just experienced a bug in Sketchfab. One week ago I uploaded a model in Sketchfab and it was working fine.
Since then I opened it a few times and suddenly it stopped loading (it hangs at 49%)
I first thought that it is only my machine, but since it crashed I cannot open it at other machines as well (it also hangs after 49%). So apparently something is wrong on the server side?
The model can be found here: