https://bugs.winehq.org/show_bug.cgi?id=53066
--- Comment #20 from Roman Pišl rpisl@seznam.cz --- (In reply to Zhiyi Zhang from comment #19)
(In reply to Roman Pišl from comment #18)
I also use a custom Qt application with no other bugs observable which spams console with "OpenThemeData() failed for theme 16 (WINDOW). (Element not found.)". That is probably for another bug report..
Could you provide this application?
Yes, I will prepare a minimal example in a new bug report.