Importing & Exporting Halo MCC Reach Forge map into Blender

[OnePurpleDuck]

So the long story short is that I saw this blender tool/mod you made and was hoping it could help overcome Halo Reach's forge object limit, by importing my map into blender using your tool/mod and then exporting it back. But I'm struggling to even import in the map to start with.

Hopefully someone can view the image I've attached and tell me what I'm doing wrong. Thanks to anyone that's able to help.