cannot kissable root user in my admin account

When I try to disable root user, and when I click it nothing changes.

Directory utility-Top Pane-Edit-Disable root user

Nothing changed

Then I clicked change root password, I wrote a password clicked enter but then again no verification of change.

I went to terminal, wrote dsenableroot -d it asked for my user password, I entered the password which I use logging in to my mac, it says failed to disable root user.