I'm on Xbox One my username is UnsungSniper. I'm switching over from 360 to Xbox One today but I don't think that has anything to do with me not being able to sign in. it is saying error code tapir And it won't let me sign in. As soon as I finish the switch over process, It would not let me sign in. I believe this is the work of the tapir Error code. It would be really cool if you could fix this coz I have friends waiting For me to finally join them on Xbox One it would be really cool if I could:)