ERR_EMPTY_RESPONSE after 1st use

Just installed Quickbox on ubuntu 15.04 LTS Server, and managed to use it only for one time. Rebooted my server and now I get ERR_EMPTY_RESPONSE either using IP or hostname. Tried “reload” as root and also “service apache2 restart” without luck.

I also reinstalled the ubuntu VM and made the installation again, the same happens.

QB is made to support Ubuntu 15.10 or 16.04. I see your are on 15.04