https://zachbardon.com/mafiatools/ was online for me now so it may have been your connection.

For future reference there are files hosted there and shared by scripts so if the site is down for a while, other things will break. batfactors is one file that I recall is there.

The host/owner just got married and is pretty much on honeymoon for the month of May (2018) so if there is a repeatable problem, patience is advised.