Our open data portal has been working for a long time now, but looks like at least as recently as yesterday everything gives a 404 error when we try to access it. I have no idea what we might have changed on our end to cause this. I saw that Daniel Fenton had addressed this issue (I think it's the same issue?)with someone in the fall, but there wasn't an obvious solution given that I saw, beyond I guess a bug fix on ESRI's end?