How do I play online on Minecraft Win 10 Edition?

I've had Minecraft Win 10 Edition for a few years. But since the last time, I have not been able to join Xbox friends anymore. It used to work just fine. I was able to play with any X people.

As an "error" it says: No connection to the world "

But my internet is TOP!

Do you have any ideas

It could be your NAT type.

And what can you do there?

There's actually nothing you can do about it, but it could be your friends' internet

Yes! It is the Teredo.

No problem!