The documentation states that you'll be asked where the assets are the first time you run the game so that it can convert them, I'm not getting that at all, just an error that doesn't even make sense:

usage: openage [-h] [--version] {game,test,convert,convert-file,codegen} ...
openage: error: directory does not exist: ./assets

The part that doesn't make sense is "directory does not exist: ./assets" because even if I create a folder named ".assets" on the current folder, I still get the same error, so I assume it's looking elsewhere (but again no information on where).

Running something like "openage convert" instead still just results in the same error.

What exactly is the process to convert assets and run the game once you have installed OpenAGE on Linux?