Hi,
I get the error:
too many certificates (50) already issued for "strangled.net" in the last 168h0m0s,
But strangled.net is a domain of some dyndns-service. Can you please set the limit for it to some higher value ore remove it at all? Otherwise the superbe efforts setting up letsencrypt and strangled.net are spoiled by some minor insignificant flaw.
The owner of that service could request a rate limit increase, if they think it needs more than 50 new certificates per week. The error message that is returned includes this link describing the details of the rate limit and how the domain owner can request an increase:
The limit is a "leaky bucket", so an additional new name on that domain becomes available every 202 minutes. So if you just try again later, you might manage to get one.
If the subdomains of that dyn dns domain are used by unrelated people it should probably be added to the Public Suffix List. That would place it outside that registered domain limit you ran into. The PSL provides various security benefits between those subdomains among other benefits. See: Learn more about the Public Suffix List