Is your system running Wayland? I recall OBS screenshare wasn’t compatible with Wayland at all. I had to log out and log in using the X11 fallback to get it to

Is your system running Wayland? I recall OBS screenshare wasn’t compatible with Wayland at all. I had to log out and log in using the X11 fallback to get it to work. It’s a rather unfortunate condition that past tutorials say “just do XYZ and it works” but they quietly assumed X11.