For anyone running into this problem, the reason probably is you've installed a Zope module from some other source than the official repository. I managed to fix this with the following commands:
cd /usr/local/lib/python2.7/dist-packages/zope sudo ln -s /usr/share/pyshared/zope/interface/ Credit for the solution goes to: http://anibalpacheco.com/?p=51 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1085425 Title: Crash in software-center when starting service com.ubuntu.sso To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/1085425/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs