Discover not start updates

[wonder]

Hi,
Since yesterday, I have the icon of Discover with new updates, I open Discover and appears the new updates (Firefox 61.0.1 and some more updates) when click in Update All, then not prompt for my password (always prompt password and then start update) but since yesterday, no, not prompt for password.
I can't close Discover, I can't shutdown or restart computer (appears a message indicate that, Discover stop shutdown or restart) only can restart with reset buttom of my computer.
When restart, again, I have the same problem with Discover.

Kubuntu 18.04 of fresh install.

Thanks and regards.

[Snowhog]

After rebooting and logging in, open a konsole and type:

sudo apt update
sudo apt full-upgrade

Report any errors.

[wonder]

After rebooting and logging in, open a konsole and type:

sudo apt update
sudo apt full-upgrade

Report any errors.

Thanks.
I made and, not, any error, all update fine and disappears the discover icon.

Only prompt, in update, for unattended-upgrades because indicate, my actual version, are modified localy, I indicate install new package/version.

All fine at the moment, I wait appears again Discover for view if now, run good.

Again, thanks.

[SpecialEd]

I get the same issue since yesterday's updates. I had to kill Discover. In the mean time I'm using Pkcon refresh/Pkcon update.