FIFA 20 head files with blender add-on


Club Supporter
Hello all,

I am seeking your expertise. I'm trying to access the 3D head files from either FIFA20 or FIFA21. I've been made aware of an add-on for blender which allows you to open .rx3 files but I'm struggling to get it working. I'm getting this error message:

Could somebody be so kind as to give me an idiots guide on to how to resolve this?!

Thanks in advance for any help.