Probably because you didn't download the mods necessary for it to work properly. You can download them at the page. If does not work, resort to the usual: clear cache.
Yes, unfortunately the map broke probably due to a game update. I will try to solve this problem when I have the right motivation to do so. Patience is everything now. Stay fresh and peace!
I can't wait for this to be updated. Tried to load an earlier version of BeamNG just to play this map, miss it.
