Hello,
Recently our Adopta program stopped accepting e-mail inputs giving the message,
"Unable to initialize security handler. No module named arcrest.security."
The only change made was the creation of a dashboard pointing to this layer to simply show how many have been adopted, I don't believe that would be the cause of the issue.
Here is the link to our existing adopta page.
https://maps.vbartlett.org/adopt-a-hydrant/
Same thing has happened to me. Did you ever figure out what caused this?