schaij: When I start the game, I do not get past the "contrast settings" dialog. I cannot click on anything.

The console says:
Preloaded 'libfmod.so'
Preloaded 'libfmodL.so'
Preloaded 'libfmodstudio.so'
Preloaded 'libfmodstudioL.so'
Preloaded 'libsteam_api.so'
Unable to preload the following plugins:
ScreenSelector.so

But "ScreenSelector.so" is in the same subdirectory as the other *.so files.

I am on Ubuntu 18.04 with 64 bit.

What can I do to fix this?
Thank you.