Problem connecting to friends realm.

Error code coming up : internal exception java.net.socketexception connection reset.

This is the code i get everytime i try to connect to my friends realm. Everyone else seem to connect and are able to play at all times. Some rare times i can play for a few hours but then it crashes and won't let me inn again, leaving me stuck with this error. I have tried everything i could find. reinstalled the game, restarted the internett, flushed my dns, making sure java is allowed through the firewall, checking vpn and so forth. I have never had this problem before 1.18. Please help as im desperate and don't know what to do.