Counter Strike 2: "VAC was unable to verify your session"

I'm just wondering if anyone is facing a similar issue. I suspect this might've been caused by some recent package update.

I've tried every proposed "cure" there is I could find:

• changing profile name / avatar
• full steam reinstall with nuking all of it's directories
• full game reinstall
• I've must have verified game files at least dozen times
• trying with/without gamescope
• trying with/without gamemoderun

This thing happened in the past as well but usually reboot helped, now nothing seems to fix it.

I'm running hyprland but it's not working in bspwm either.

What is worst, game is working fine on windows.