I installed steam on my wine 64 virtual drive. I have installed ETS2 and after it I installed ETS2 Multiplayer successfuly. But now, after I launch ETS2mp.exe (Launcher.exe)
I get this error. Eurotruck Singleplayer on steam works fine.
That's not really the correct way to run executables with Wine.
Since the PATH environment variable should include the directory the executable is in - but won't - since you're running the executable from "${HOME}" as the Present Working Directory...
What command are you using to launch the singleplayer version of the game?
Or are you just using the Steam Client interface?
If you get stuck...
I've got the native version of Euro Truck Simulator installed (using the native Steam Client).
So I can test out the Windows version in my 64-bit Steam WINEPREFIX (since I share my main Steam Library).