Ninjineer hex?

Okay first off I want to apologize if I’m doing something completely wrong but as far as I can tell this model doesn’t work in Gmod. I’ve recently spoke with the creator of the Ninjineer and he directed me to a deviantart page that has his model in a Freak Fortress pack. After downloading and trying to make it work, I’ve had no luck and I’ve only gotten those obnoxious red ERRORs

So I’m asking you guys here: Can someone PLEASE get the Ninjineer working with Gmod for me, please?

The link in question is right here