Well my fix was easy. I just sudo mkdir ./plugins and was able to successfully upgrade. Though I don't know why it broke in the first place.
-- update manager partial upgrade fails https://bugs.launchpad.net/bugs/335416 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs