https://bugs.winehq.org/show_bug.cgi?id=50530
--- Comment #3 from consolelogger consolelogger@rhyta.com --- OK, I tried some workarounds. There seems to be a symlink that is needed, not sure if that even is a wine bug, but it is required.
From inside the programm's main installation folder
ln -s ./bin/webrtc_dcs_plugin.dll ./webrtc_plugin.dll ln -s ./bin/webrtc_dcs_plugin.dll ./webrtc_dcs_plugin.dll or ln -s ./bin/webrtc_plugin.dll ./webrtc_plugin.dll
(depending on you version number the wertc*.dll file might have different names. I did the first two (probably only one of them is actually needed).
Then with quite a lot of native components installed like this:
winetricks vcrun2017 corefonts xact d3dcompiler_43
the program seems to work. It will take quite a while to load from the main menu and then again quite a while to load any scenario you select. But seems to work somewhat.
[the critical piece of information about the symlink was found here: https://www.protondb.com/app/223750 ]
Thanks a lot for the work everybody here does on wine. Have a nice day!