When I try to log in on Linux client the game always asks me to ensure Steam is running or update my account but my game was bought through steam.
I tried to reinstall the game multiple times and once it just logged in, but after a reboot the game is inaccessible again.
At the same time can you run other steam games properly? This error happens when there are steam connectivity issues. Maybe something with your firewall or internet service? I don’t know. I’ve been playing this game on Linux for ~450 hours and never had this problem. Also, what version of steam are you using? flatpak or native?