Thanks for your bugreport. This sounds like a transient error with your mirror not being up-to- date. The software-properties-gtk package is available now and there is a new gnome-app-install 0.3.18 package available.
Could you please check if those updates fix the issue for you? Thanks, Michael ** Changed in: gnome-app-install (Ubuntu) Status: Unconfirmed => Needs Info -- [apport] gnome-app-install crashed with ImportError in <module>() https://launchpad.net/bugs/83643 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs