Game doesn't allow me to sign in to my MS account

Hi,

I received the invite to the beta, and received the beta key to download on steam (PC).

After launching the game and getting to the main menu with music, I’m prompted to sign in on my microsoft account. But after I sign in, it just keeps prompting me to sign in.

I used a different email for my Halo insider account and my Halo beta invite email, but I tried both and both don’t work.

I tried deleting the game and deleting the local files on Steamapps/Common/Halo, and reinstalled it. It still gives me the problem.

Any help would be appreciated, thanks.