I just installed Ubuntu 18.04 LTS and get the below message when I open the Ubuntu software app. My computer is updated to the latest version. How to solve this.
I was having same problem, no Internet issue was there. I did following -
Installed gnome-shell-extensions again
sudo add-apt-repository ppa:gnome-shell-extensions/ppa sudo apt-get update sudo apt-get install gnome-shell-extensions
I reinstalled gnome shell extension in firefox, and after some time, it started working. After that Ubuntu Software Manager showed no such error.