I can't join my friend's iOS world from Windows 10.

I am having the same problem, however, for me, it is my friend who is on the Xbox and I am on the Windows 10 version. He cant join the world that I created anymore. He can, however, join me if I create a new world and I can join any of his old
worlds. I Have a theory on what the problem is. We were playing the game fine one afternoon and we both had to get off for a bit to do other things. When I came back it said that my game was updated and some bugs were fixed. From then on my friend can't
join any previous worlds I created but he can join new ones. You will encounter a similar problem on the java edition of Minecraft if you try to connect to a server with a wrong client version. It appears as if the clients updated but the world it's self
did not which is why my friend can't join. That is my theory at least. I did what you said above and it and it still doesn't work.

I can join the Xbox from my Windows 10 not a problem. The problem is if I'm on the Windows 10 open world the Xbox cannot join me. Both are on the same Microsoft account but different licensing.

Hello,

You will need to check your Windows Firewall settings.

If Minecraft is not allowed in the Firewall, the “Unable to connect to world” issue can happen. ... Click Allow an app or feature through Windows Defender
Firewall.

I have the same problem! I can join other people’s worlds, but when i create a world people can’t join my world even when I invite them. I have cellular data does that have anything to do with it? When i go into settings in Minecraft it wont let me turn
on friends of friends. Please Help! It is ios.

Hi, I'm Lucky and I'll try to help you this afternoon. He may not have an updated version of Minecraft yet. Trying checking for updates, if that's not the case try making a new world/server.

I hope I helped resolve your problem

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