Can't connect to friend's game

Greetings! I have been experiencing an unsual network problem in Borderlands 3: I can’t play with my friend.

Each time I’m pressing “Join” I’m seeing loading screen and then I’m greeted with “Connection Error”. He also unable to join my session, experiencing same problem. Even though, we can group up on the main menu screen.

The strange part is that we both able to queue up in Multiplayer and play with others. It seems like we just cant join each other’s game.

Has anyone experienced anything similar? We have tried everything: opening ports, disabling antivirus, linking and unlinking SHiFT connection to Steam, verifying game files, you name it …

I’m a bit desperate at this point.

I have found the problem. Apparently, it was Hamachi blocking connection.

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