Get "outdated client" trying to join shared multiplayer world.

So i Play on Android but with a controller but that is besides the point. What i want to address is that yhere is a problem with joining worlds. I have been meeting people on an app called moot bit when they give me their gamertag and let me join the world it dosent it just says Unable To Connect Outdated Client But before like 3 days ago my friend joined me until it started happening you might not care to much but can you please try and fix this problem.