Comment 4 for bug 1769185

I tried installing and running, I'm finding bugs.

$ cubic

Cubic (Custom Ubuntu ISO Creator) is a graphical user interface application and should be run using the application launcher. See "man cubic" for more information.

==== AUTHENTICATING FOR cubic ===
Enter superuser password to start Cubic
Authenticating as: matt
Password:
polkit-agent-helper-1: error response to PolicyKit daemon: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for cookie
==== AUTHENTICATION FAILED ===
Error executing command as another user: Not authorized

This incident has been reported.