https://bugs.winehq.org/show_bug.cgi?id=45420
--- Comment #4 from Hans Leidekker hans@meelstraat.net --- (In reply to alex.skatingcassano from comment #3)
(In reply to Hans Leidekker from comment #2)
Why do you think this is a bcrypt bug?
Because the only thing that shows up in the console when pressing the Multiplayer button is related to bcrypt, and after i click "Cancel" no other errors are thrown.
The bug could have happened before you pressed the button. Can you get a WINEDEBUG=+bcrypt,+relay,+seh trace?