https://bugs.winehq.org/show_bug.cgi?id=34517
--- Comment #8 from Adam Bolte abolte@systemsaviour.com --- I should also point out that entering invalid credentials causes the game to successfully reject the login. The crash only occurs when valid credentials are submitted.
Since basic authentication appears to be performed fine, this would imply that the crash only occurs immediately after an authenticated connection is established (and not specifically "when trying to connect to server" as the title states).
Sorry, I should have pointed this out sooner.