Your whole model is smaller than 0.5 or 1 quants (judging from the screenshot)...
Just scale it, like I said two times before, by a factor of let's say 64 and everything will be fine.

MED -> Object -> Scale Global -> Scale factor: 64


"Falls das Resultat nicht einfach nur dermassen gut aussieht, sollten Sie nochmal von vorn anfangen..." - Manual

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