Halo 5 Beta Ended Early?

I downloaded the update and now when I try to play the beta I get a message that says, “The Halo 5: Guardians arena multiplayer beta has come to an end. Thanks to everyone who participated.” The title screen clearly says the beta is supposed to last until January 18. Is this a server error or did 343 cut me off early?

If this is anything like every other Halo thread I’ve seen, I’ll now get replies from 1,000 people who say the game works perfectly for them so I’m an idiot. I never ceased to be amazed by the Halo glitches that apparently occur only for me.

OK, it works now. I had to restart my Xbox twice, and the second time I had to physically unplug it from the wall.