[Snapshot Pro] White screen of death

Hi there, I installed and activated WPMU Dev and the add-ons recommended in the the quick start process. However at some point installing them made my site go down, and all I could see was the white screen of death.

The site went down after generating a backup luckily so I am restoring the site now.

Is there any obvious thing that could have caused the site to go down?

In my Dashboard it kept saying that site was disconnected for the purposes of backups, even after reconnecting it several times, not sure if that is related.