For reference, I’m using the dehydrated client, generating 3 certs for 10, 6, and 7 domains (altnames). I get the above error after 5-6 challenges have been requested for the altnames. I’m currently running the script from Israel. I’ll try again later from a server in us-east-1
This is the most likely explanation but it's hard to say with 100% certainty without logs with timestamps. The observed error matches the brief issue with had with our CDN on Thursday.
Glad to hear it - Have you tried again from .il? It shouldn't error from there either and if it does I'd love to get it fixed