Launches fine in many different proton versions, but when I get to the menu it says "press enter to play", the text "getting profile information from your platform" shows for a second, then I get an in-game error "sign into xbox live", then it just spins. Presumably a login popup should show up but one never does. I have tried clearing all 'Steamapps/compatdata', full removed my ~/.steam, and ~/.cache folders and reinstalled steam, tried 10+ proton versions, and used winetricks to update dotnet but it never pops up.

On Windows the xbox app pops up to login. I seem to recall it just being a standard microsoft account sign in, has anything changed? If you close out of the xbox app( On windows) after it asks you to sign in on, you can replicate this behavior