abort: HTTP Error 500: Internal Server Error

I am receiving this error when trying to push to one of my repositories. Other repos on my account appear to work fine, as does my bitbucket account.

I have not done anything special; I've been using this repo for about a year with no problems. I committed and pushed just fine last night, however, today I am getting this error everytime I try to push to this repo, from several different servers

Is there some sort of downtime? How can I fix this ?

Edit: The repo is this: https://bitbucket.org/livemedia/cpack/ (private)