Halo will not load - post update

For one reason or another, immediately following completion of the Warzone Firefight update I have been completely unable to load Halo: 5 at all. Each time I try to load the game it immediately stops, cutting out to dashboard and just not working… It worked fine beforehand with no issues, but now I have all the problems. It does not even make it a single second into loading it.

I’ve tried hard resetting, and clearing the cache. If it matters, the game is stored on my internal drive (I moved it hoping it might help).

EDIT: I’ve uninstalled the game with the intention of reinstalling it. So I seriously hope this 87GB update is worth the time it’s going to take.