https://bugs.winehq.org/show_bug.cgi?id=52006
--- Comment #3 from Josesk Volpe joseskvolpe@gmail.com --- So we're facing a very weird bug here... I tried out Light theme and i still got this issue, tried again disabling themes and the emulator UI opened up. But somehow you're not being able to reproduce it with any theme and the applications works out-of-the-box with and without themes.
I've tried many different themes, including Wine's Light theme, and i could reproduce this bug with all of them If that's a issue on my operating system, partitioning, drivers, another Wine component etc and not with the themes, somehow it's affecting theming for me, but strangely only for me, wich is normal as functionality for a multi-platform software like Wine may differ to users.