Board Thread:Bug Reports/@comment-26491452-20160822010826/@comment-27219153-20160822011821

It says it can't register the dimension with id 3 because there is already one registered with that id. I am personally confused as to why there is a dimension with id 3, as you don't have any mods that should add that dimension.Unless you changed your LOTR config file to use id 3 for Middle Earch or Utumno, there shouldn't be an id 3 dimension. My advice is to redownload the mod and see if the problem persists.