I had this issue. It was due to an issue with package ubuntu-sso-client-qt installation.
running
sudo apt-get install -f
did not solve the issue. But after running
sudo apt-get install --reistall ubuntu-sso-client-qt
I was able tu update software again.
I had this issue. It was due to an issue with package ubuntu- sso-client- qt installation. sso-client- qt
running
sudo apt-get install -f
did not solve the issue. But after running
sudo apt-get install --reistall ubuntu-
I was able tu update software again.