Where you describe that username changed

[Boris Berdichevski]

When enter to WEB Gui, there is 'root' instead 'admin', where you notified about?

 

[cyberjock]

Sorry, I don't understand what you are saying.

In the *nix world, root is the proverbial "administrator".

 

[Boris Berdichevski]

I cannot enter to GUI while I didn't understand that username must be 'root' instead 'admin'!
There is a change from 9.1.* version.

 

[cyberjock]

Yes. The release notes for 9.2.0 explain the change. In short, the old "admin" account is gone. Now you login as root with your root password. The first time you upgraded to 9.2.0+ it should have prompted.