In a recent commit [1], the Vagrantfile.example was updated to use Fedora 27 rather than Fedora 25. So if you are using Vagrant to hack on hubs, things might get a little funky.

When first setting up the Vagrant dev instance, you need to copy `Vagrantfile.example` to `Vagrantfile`, (`Vagrantfile` is not stored in the repo). So be sure to either update your Vagrantfile, or if you havent changed it, just re-copy it over from Vagrantfile.example after git pulling.