Hi there, I play Minecraft on mobile, to be more specific, IOS adn there seems to be a problem with joining other players-

There seems to be no problem whenever I'm play alone, but whenever I seem to join somebody else's world it says "unable to connect. Please restart your client" followed by "P2P/SIG: no session(0x00000005)" I'm unsure if this is a issue on my part or friend's, but we've tried restarting minecraft, signing in and out, and inviting one another, but the same problem keeps on appearing. I hope this issue can be solved, as I enjoy playing with my friends.