@MojangSupport I can’t play with my friends for over a year now. I can only play singleplayer and online servers, but when my friends try to join my own world or if I try to join them i get an error message saying i couldn’t connect.

Well, let's try to get you playing with your friends! Grab me a screenshot of the error that you're seeing and I'll do my best to assist you from there. ^TK

This is the error message i am getting, it’s in Dutch.