update-manager crashed : org.freedesktop.PolicyKit.Error.Failed: ('system-bus-name', {'name': ':1.41'}): org.debian.apt.install-or-remove-packages

[Yionel]

Hi,

On Ubuntu 12.04.2 LTS up to date when I go to "System Settings">"Language Support">
I have a popup :
"The language support is not installed completely
Some translations or writing aids available for your chosen languages are not installed yet. Do you want to install them now?
Details
hunspell-en-ca"

When I click on install button :
"Could not install the full language support
org.freedesktop.PolicyKit.Error.Failed: ('system-bus-name', {'name': ':1.41'}): org.debian.apt.install-or-remove-packages"

Thank you