Game Crashes by Export to BeamNG.drive

Hello,

I want to export a car to Beamng, but the game just crash by exporting the parts. This is the first time, that this happend, yesterday it normally worked with an other car but today not.
Can please somebody help me?
I maked a Viedeo, but I cant post it here, because this site is not supporting mp4.

best wishes
Tobi