Thanks for the report. Please, upgrade your system and run the following command in a terminal:
gnome-app-install Paste the error messages here, please. ** Changed in: Ubuntu Sourcepackagename: None => gnome-app-install -- Add/Remove... closed unexpectedly https://launchpad.net/bugs/82722 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs