I was unable to acccess ANY Forumotion site - getting that same message, even on the Support forum -until just now.
The Support Forum is back up now also.
Seems whatever the problem was has now been resolved.
This topic on the Support Forum will probably tell us soon what actually happened there:
Apologies to anyone faced with that message this morning - and this announcement explains that it was a universal issue on ALL Forumotion sites.