Thanks for sharing the repo. I managed to compile the patched version following the instructions "Building Biarch Wine On Ubuntu" from WineHQ.

But QtWebEngineProcess.exe is crashing every time I'm starting Origin. Its window is staying on the screen but remains empty. When clicking the error message, the procedure repeats. When closing the window, a second Origin window is coming up, remaining empty and crashing QtWebEngineProcess again.
I've tried to start Origin.exe with an older wineprefix, where this error doesn't occur with "vanilla" 2.19-staging (here, of course, Origin can't login into their servers). And I've tried to start OriginSetup.exe within a fresh wineprefix.

Is there something I can do or try at this point?