I have kali rolling in a live USB (not encrypted). I opened a non-administrative account and added it to the sudoers file.

However, every time I try to open the root terminal in that non-root account, it asks for a key ring. I type the root's password, the non-root account's password and neither work.

Where can I find this famous key ring in Kali rolling? PS. The root terminal worked once before and all of a sudden now it asks for this.

Thank you!