Connection error - pop-op asking for authentification for update

Problem: a pop-op prompt saying "Authentification is required to set the network proxy used for downloading packages" keeps appears but require sudo right to continue.

This is possibly the same/related error:

Cause: It seems to be a generic error message caused outdated driver somewhere. Update 2021-01-21: this should be fixed now (@mcvinding)

Solution: Probably that the drivers need to be updated by someone with sudo access. Until then, this post tells how to ignore the pop-up message permanently: Launch a Terminal Console and type gnome-session-properties and then uncheck the PackageKit Update Applet. Then restart your VNC server.

The solution is from https://unix.stackexchange.com/questions/242423/banish-a-popup-error-message.