PropHunt server not working

So I am trying to setup a prop hunt server but when i try to change the gamemode I get “gamemode not found”
Using the gamemode from this link:

If this is indeed installed correctly, then your startup parameter should just be ‘prophunt’ instead of ‘prop_hunt’

As for the error you’re getting, you need to find the .vmf file for the model. Go to models/props/cs_militia and follow the guide for editing the vmf file here.