Update error - opera NO_PUBKEY

[stevef]

There is a problem with the opera part of the update/upgrade.

Please can you open a terminal by pressing 'Ctrl' 'Alt' and 'T' together.  In the window that opens, type in this command followed by enter.

Code:

sudo apt update

Enter your password if required.  This will try to refresh your upgrade cache.

Then this command followed by enter.

Code:

apt list --upgradable | grep opera

This will show current and proposed versions of opera

Then this command followed by enter.

Code:

inxi -r

This will list your repository settings.

Post the results of the commands back.