I'm getting this error as well and the broken packages fix does not seem to make any effect. Anyway, I get this message in the command line after clicking on "Do the selected tasks":
org.freedesktop.PolicyKit1.Error.Failed: Error getting subject: Error parsing unix-process subject: Value for key `start-time' found but is of type i and type t was expected
I'm getting this error as well and the broken packages fix does not seem to make any effect. Anyway, I get this message in the command line after clicking on "Do the selected tasks":
org.freedesktop .PolicyKit1. Error.Failed: Error getting subject: Error parsing unix-process subject: Value for key `start-time' found but is of type i and type t was expected