Help: blender error with a Chugginator unit

Importing the attached chugginator unit, blender gives a script error, then shows this unit in a "shader" form. It seems having UV problems, but I'm not 100% sure. Thus I'm not able to exporting it.
I'm interested in cutting and exporting upper body with head, preserving its current UVs that you can see using nifscope.

I have had this happen to me as well, and I am in the process of trying to make some ancient Spanish and Portuguese units (as well as a Portuguese Cacador). These units were supposed to be made by others but apparently that isn't happening anymore and I need them for my mod. So I second his question.

I solved it myself with a workaround

Using nifscope, I exported the mesh as .OBJ then imported it into a new .nif. After that, blender read it correctly. I lose the skeleton (BIP node) in the process, but I didn't care about it because I wanted mesh part only.