Welcome to the forum 
There are so many changes going on right now, I’m not surprised it isn’t working. Some months ago we were able to run a local network with 3 Vaults. It’s explained in these topics:
MaidSafe Dev Update 31st August 2015
MaidSafe Dev Update 31st August 2015 - Part II
But after that, some new sprints have started. Some libraries are getting a big refactoring. So I think that’s where the problem is. We will see another Dev-update today or tomorrow. You can ask the Devs (they have “Maidsfafe” in their profile name) for more info at that moment. They’ll know what you can build yourself and what not.
EDIT: Do you use the installers from the links above? I see they’re still there. Don’t know if these still work in combination with Waterfox or Firefox.