I can log in on my Halo 5 account I need help please fix bug
You can open the pack from here on Waypoint: https://www.halowaypoint.com/en-us/games/halo-5-guardians/xbox-one/requisitions/unopened-packs
As for being unable to access your Halo 5 account, probably going to need a bit more info to help out there: like are there any error messages? what exactly happens when you try and load the game up?