I know this is an old topic but I was running into the same problem. Of course I found this thread, and also found no solutions. I literally went through EVERY LINE of these files before I figured it out. It had to be something done on purpose from the author to prevent copycats. It also had to be something that would be ignored by the game by not by Final Alert. If you go to the Theater section of the map in a text editor you should find that it will be Desert or Temperate. Well if those are not all in caps ie DESERT or TEMPERATE then you get this error. You just have to change the case and it should open. Hopefully this will help someone!
