I've recently started using Ubuntu on my old laptop and I actually really like this OS, but somehow I've lost my superuser rights and idk how and why. As you can see in the screenshot, I've already tried to install the package with "sudo dpkg -i 'package name'" and the terminal didn't install anything and showed "Setting up nordvpn-release (1.0.0) ..." instead.
I really have no clue, what's behind all of this and how to fix it.
Setting up nordvpn-release (1.0.0)
) and your command finished without error, so it's installed. – mook765 Jul 22 '22 at 20:37