3D: ...wrl does not show in FP

several time I converted .stp (given by manufacturer) to .wrl, using FreeCad.
I add .wrl to the FP, scale it to 1/2.54, works fine.
Today it doesn’t. My FP is a PCB itsself, it fits into a phoenix housing BC-107.
Here’s the .wrl:
Unnamed-pxc_2896076_04_BC-107-6-OT-U11-KMGY_3D.wrl (874.0 KB)
Any idea why it doesn’t work?
The bottom part of the housing worked fine, so I assume I’ve got the skills to work with 3D models in general.