Cannot join or be joined by friends on any multiplayer world

THIS ONLY HAPPENS TO ME. All my friends can join and be joined by eachother completely fine, but for some reason I can't join anyones world, and they can't join mine either. Every time I try to join someone I get the error message 'unable to connect to world' and my friends get the same If they try to join me. This is the new ps4 bedrock edition so I would assume it's a bug, but it only happens to me. We all really want to play together so could someone at least explain why this is happening? Thanks.