Update or Uninstall

[CSNLinux]

That PPA does not have any support for Ubuntu xenial I believe. To remove it from your desktop as needed, from Terminal:

Code:

sudo add-apt-repository --remove ppa:nikount/orta-desktop
sudo apt-get update

You want to install packages from repositories matching your desktop release. You can find your desktop release from a terminal:

Code:

lsb_release -sc

Thanks a million.

And Xenial it is!