Minecraft on PC - I can not enter my friend's world any more, as well as he can not enter mine

Minecraft Windows 10 Edition.

My friend X and my friends can join my game server.

I, however, am the only one who can not enter the game server of my friend X.

When I try to enter his server (both on the Xbox and from the game itself), he can not locate his server and then an error message pops up "Unable to connect to the world".

We've verified the network with the Xbox app and it's all right.

The problem only exists between me and him.

What could be it?

So i installed minecraft for play with my friends in my computer, i tried to enter into a world of my friend but it says, it is out date and the version to play wa 1.14.60 but my win10 edition is the version 1.16. They are from ps4 an they have
a xbox account. Can someone help me?

Can you check your time and date on your PC?

I can't play with a friend of mine who has PS4 (I have a PC).
It appears to me that he is online, that he is playing in a multiplayer world, but when I enter the word 'cannot enter the world' appears.
He succeeds with another guy who always has PS4, so I assume the problem is me.
Having bought the bedrock edition just to play with him, I wish I had wasted 20 euros.

Pls I can't add my sis we wanna play pls😭😭😭😭😭😭😭😭

Hello @anaclara212!

With issues like these you need to check your NAT type and make sure that it is open. That is most likely the main reason you are unable to connect to his world. You will need to check your Internet connection as well as your Microsoft account sittings. However, if the issue persists, I advise you to contact Mojang for further assistance.

Hi, I hope you're doing great out there. I am an Independent advisor and I am here to help you with your concern.

If I may ask, what is the exact error or issue that your friend is getting whenever he/she is trying to join your world?

Also, what about your other friends? Can they join or enter your Minecraft world? This is to isolate the issue if it's on your friend's end or your end.