Can't enter Forge or Multiplayer or Co-Op menu.

So I start up Halo 5: Guardians, the game starts up normally, I see the message of the day like usual, but when I try to enter multiplayer menus (Arena or Warzone) it doesn’t respond. I think weird, so I try Forge instead, also doesn’t respond. I try using a Forge feature like file search, and I get an infinite loading up results screen. At this point I am getting annoyed so I close the game, wait, then start it back up. The same thing is still happening! I even try Campaign Co-op, but that doesn’t work either! So basically I can’t do anything online related in Halo 5: Guardians. The only thing I can enter into is Solo Campaign.