This issue is well-known, but despite all solutions provided on the Internet, one of my friend has big troubles trying to connect to friends worlds. Even more weird, it works with some, doesn't with others, one day it will work for one, suddenly stops working.

I read that it could come from many parameters, and it depends of the device used.

One big suggestion I would adress is like some people said about this situation, to indicate where is the problem when this message pops up when we try to connect to someone else world. I really believe this would help a ton of players, who would fully appreciated to know better what to do.