I've just downloaded and ran the Vagrant instance following the instructions here. I was able to log in and create a project; however, when I went to the git page (http://localhost:8080/p/project/code/), all I saw was a spinner (not sure what to call that, but I'm sure you know what I mean). This hadn't changed after 20 minutes or so.
In the end, I destroyed the VM and recreated it. I was then able to get around the problem by running:
sudo chown vagrant /srv mkdir -p /srv/git/p
and then the usual "update_allura; ~/start_allura" commands. These steps are noted in the file "INSTALL.markdown", but a notice from the web interface about missing directories would be helpful; thus, I've marked the component as "SCM". However, I'd guess the Vagrant instance should come with this set up as well.
Thanks for a great project, and please let me know if you need any further info.
I've built a new vagrant image and this is part of it now. Thanks for the report.
https://forge-allura.apache.org/p/allura/wiki/Install%20and%20Run%20Allura%20-%20Vagrant/ is updated to refer to the new vagrant box URL.