I just got this error while trying to check my notifications. It is the second time today I have seen it - last time I was trying to open an observation. Also twice I have got a page saying “iNaturalist is down”, although just on a white page, not the whale shark or the other critter you get when a page can’t be found.
What ISP are you on? I’ve had this happen to me 10+ times now today as well (not via the notification button, but on a random assortment of pages on iNat), on Telstra
I saw this a couple of times yesterday as well while trying to pull up observations from the Identify mode. Not sure about ISP - it was on my office computer (yes, working those Sunday hours and procrastinating by doing IDs on iNat…).
I saw it last night during the Super Bowl and figured it was just heavy traffic from that. But then a bout of insomnia had me up at 3 am this morning and received it again.
I got a few of these about 2 nights ago, as well. It was only when trying to load certain things and it was infrequent, so I assumed the issue subsided.