https://bugs.winehq.org/show_bug.cgi?id=56118
--- Comment #5 from Matheus matheus.venturini@acad.ufsm.br --- Oh, interesting. I did find it strange that somehow the shell API could be causing GUI bugs...
Indeed, trying to click on UI elements makes the pop up for a split second and then go away, but you can't interact with any buttons in that black area. Fortunately, it's only for dialogue and tips, so the game can be played just fine (although, I'm forced to look up some gameplay on Youtube so I can get my bearings...)
Thank you for the interest in this bug, and have a happy new year!