https://bugs.winehq.org/show_bug.cgi?id=50420
--- Comment #2 from Béla Gyebrószki gyebro69@gmail.com --- (In reply to Paul Gofman from comment #1)
SetDisplayConfig is called from SDL2.dll shipped with the game in the game .exe directory. I guess that was working before the blamed commit because it was picking up an SDL2.dll from Steam installation somehow (not sure what it was doing in the GOG case). I checked that copying Steam's SDL2.dll to the game exe directory fixes the issue.
It looks like adding a stub for the missing function is enough, https://source.winehq.org/patches/data/197766 is fixing the game start for me.
Thank you for the proposed fix, Paul. The patch fixes the problem with the GOG version as well.