BoxColliders does not support negative scale or size. The effective box size has been forced positive and is likely to give unexpected collision geometry. If you absolutely need to use negative scaling you can use the convex MeshCollider.

[Uthyr]

Crash log absolutely fills with thousands of repeating:

BoxColliders does not support negative scale or size.
The effective box size has been forced positive and is likely to give unexpected collision geometry.
If you absolutely need to use negative scaling you can use the convex MeshCollider.

Then 3dxchat crashes.

The file 'archive:/CAB-bfea229faea7671f54f5af7fed252f6e/CAB-bfea229faea7671f54f5af7fed252f6e' is corrupted! Remove it and launch unity again!
[Position out of bounds!]

Why?

[Gizmo]

This error is generated by the Unity Engine. We do not recommend using negative scale for anything.