It seems you use "xdg-open" to run something. It complains that you use "xdg-open --args", which is not a valid parameter according to 1.0 and 1.1.
I'm on Discord if you need more information and a test pilot :)
Hi again! I only use Windows and macOS myself, and I don't have that much experience with Linux. We're exporting the Linux version as a courtesy, and most Linux users have been running the game without any issues. I suggest you check with the Discord community by asking in #general channel to see if anyone can help. Sorry that I'm not able to provide better help myself!