sudo apt-get upgrade

I've just run:

sudo apt-get upgrade

And at the end I get the following error:

Setting up liboxideqtquick0:amd64 (1.4.2-0ubuntu0.14.04.1) ...
Setting up liboxideqt-qmlplugin:amd64 (1.4.2-0ubuntu0.14.04.1) ...
Processing triggers for libc-bin (2.19-0ubuntu6.5) ...
Errors were encountered while processing:
 update-notifier-common
 update-notifier
 update-manager
 ubuntu-release-upgrader-gtk
E: Sub-process /usr/bin/dpkg returned an error code (1)

Would anyone be so kind to help me fixing this?