"Software can't be installed or removed because the authentication service is not available. (org.freedesktop.PolicyKit.Error.Failed: ('system-bus-name', {'name':  ':1.23'}): org.debian.apt.install-or-remove-packages"


followed by

"You are not allowed to perform this action
You don't have the required privileges to perform this action.

org.freedesktop.PolicyKit.Error.Failed: ('system-bus-name', {'name': ':1.23'}): org.debian.apt.install-or-remove-packages"