Torgeek
What does package has no installation candidate mean?
What does Package <package> has no installation candidate means that the package is not found in your Ubuntu releases software sources. One possible reason for this message is that this package is an old package that has been discontinued from your release's default repositories.
Why is Ubuntu Software Center not working?
Software Center Not Loading
Sometimes the Ubuntu Software Center fails to load. If you see a message such as “Unable to download from … ” it usually means that it cannot read the local cache, as it doesn't exist. If the above doesn't work, you may need to reinstall Gnome-Software.
