Not working with pebble classic

I just bought pebble classic and Nightscout watchface works fine (just BG without graph) but Urchin and Simple CGM Time do not, they seem to not be able to get data from my NS site. What is required from NS setup on server side (plugin, access rights?) for Urchin to get required data?
barteknightscout.herokuapp.com << this page is not accessible by urchin and simple cgm time.