Probably just some glitch.
That sounds right. I'm in a country for a while that has 'less-stable' internet and it happens all the time for all sorts of sites, even the Radio Times or Amazon sometimes. If I connect to my UK VPN that I use for watching TV etc, it connects without a problem. A technical glitch sounds most likely.
A couple of times over the past year or so, PF has been off for a while everywhere, probably maintainance either by the service provider or by PF. Usually lasts a few hours.