http://bugs.winehq.org/show_bug.cgi?id=57797
--- Comment #13 from Richard Yao richard@ryao.dev --- I have solved half of the mystery. Running `wine winebrowser www.github.com` breaks on my machine too. The message being printed was being printed by my native chromium browser, rather than CEF. Nothing I do in the registry to change the browser appears to fix it, but if I change KDE to use firefox instead of chromium as its default browser, login works. This is a different bug that I will need to file later. That said, How Jorge can avoid the need for that patch to be able to run this at all is still a mystery to me.