https://bugs.winehq.org/show_bug.cgi?id=55024
--- Comment #1 from ryu.ketsueki@outlook.com --- I think I know what may be causing this. Sims 4 Studio is hardware accelerated, even for its UI. Doing a quick search, I found people having similar issues with programs that require hardware acceleration, probably through D3D11 and stuff, down to appearing completely black like in my case. So maybe this is a duplicate of another bug.