[2020] Why cant i join this server?

Hi! This sounds like the "missing entity" errors that have unfortunately been present in the game for a long time. I believe the next update should, again, fix some instances of them, but probably not all. We're sorry about this one, but we're working on weeding them out as fast as we can! You can read more about this error in the "known issues" list on our Trello board here: https://trello.com/c/jw4XTxUA/258-players-disconnecting-with-an-entity-not-found-error-in-multiplayer