Just adding my voice to the chorus.
Funnily enough, the PA Support homepage shows up all green stating that all of PA is functioning normally.
The even stranger thing is that looking at the connections tab in the details page they are all green ticks:

however once entering the classic editor there's red flashes galore:

Something's not right but unclear what exactly or how to clear it.
I tried removing and re-instating all connectors but they keep returning as invalid.
Going to the connectors list, they show up nice and green with frequently updated "last access" timestamps.