Comment # 20 on bug 1195118 from Joey Lee

(In reply to Takashi Iwai from comment #19)
> (In reply to Lukas Ocilka from comment #16)
> > BTW, we were changing YaST Users (incl. root password handling during
> > installation) in 15.4, but this is 15.3.
> 
> I didn't check Leap 15.4, but unless the root passwd is set up before
> package installation, the same problem must remain.

Thanks for everyone's help!

I have tested openSUSE-signkey-cert package manually but didn't check it with
ISO installation. I will think another way for enrolling key after the root
password be added.