Can't play spartan ops mission

I am unable to play Spartan Ops
episode 1 chapter 5 or episode 2 chapter 2.
So far the other chapter are fine.

I have already tried playing offline, online,
solo, and with friends.

I’ve also tried re-downloading it from the disc
and from Xbox Live.

Both missions are at “The Cauldron” could that
have something to do with it?

Is anyone else having similar problems?

What happens exactly when you try to play those missions?