https://bugs.winehq.org/show_bug.cgi?id=55890
--- Comment #3 from cen.is.imba@gmail.com --- Can confirm, running with that patch works.
Even client seems to work (almost) perfectly, C:/Program Files/Eurobattle.net/xpam.exe, except that QtWebEngine.exe process crashes on startup. Not a big deal breaker though. Attached a backtrace.
I assume there is likely a dupe out there already since this is webkit, if not, let me know whether to open a separate ticket for that.