Xbox Live sign in doesn't work. When you try to sign in it flashes a message too quickly to read and then when you go back to the main menu, the sign in button is there (previously it said "signing into Xbox live...") but when you click the sign in button it flashes a message too quickly to read and moves back over to the play button.
Have tried on multiple Apple TVs with the same result.

Now it won't load any of my worlds, or allow me to create a new world, without an Xbox Live sign in (there's a new window that pops up and says it's going to sign in to Xbox Live but it doesn't ever actually sign in) so I cannot play at all on the Apple TV right now.