xbox app issues

for a few months now every time I try and sign into the xbox app on my iphone it loads a screen that says, "something went wrong" and under that it says "theres is a problem with your microsoft account. to fix this, sign into account.live from a browser".
Whenever I follow those directions your website basically just gives me a bunch of answers Im not looking for. Just help me figure out why this refuses to work correctly.

:)