During the loading phase that said that the game was still loading, but I could play the game. I clicked play and first noticed that I could not enter any battles. There just wasen't a option. Second, when I clicked EXIT icon, a error message came up that said the game crashed.
Hopefully this helps, and thanks for reading!!
I had the same problem when my game setting was placed high, but it worked when I reduced it.
Halo, are you using a Mac? If so, this is a duplicate.
Customer support service by UserEcho