Can not change admin name nor admin password

[yelonek]

Hi,
I have no problems to login to web interface. Anyway when I try to change admin name or admin passowrd I get an error that provided password is not correct. How that is possible if I log in correctly to the web interface?

 

[AndreiV]

Are you typing or copy/pasting the password?

I found that the ASUS GUI sometimes doesn't like copy/paste.

 

[yelonek]

I tried to write password but result has been same. Thanks for advice.

 

[ColinTaylor]

What router model and what firmware version?

Do you have any non-alphanumeric (a-z, A-Z, 0-9) characters in your current username or password?

 

[yelonek]

Hi, it is Asus RT-AC86U with 386.4 firmware.
I have some special characters in password, user name has only alphabetic characters.

Anyway I found reason of the problem.
My admin user name was diffrent with one visible in smb/ftp user list.
I changed it name from SSH to match. After that I log in using new user name and web ui works again.