can't fix broken packages and can't delete damaged Firefox virtual Flash Player Plugin on Linux 18.104.22.1684 and lower (click-to-play) has been blocked for your protection.
We moved the upstream bugtracker to GitHub a long time ago. If this issue still affects you please re-create the issue here: https://github.com/hughsie/PackageKit/issues
Sorry for the impersonal message, and fingers crossed your issue no longer happens. Thanks.