Saving debug log to /var/log/letsencrypt/letsencrypt.log
Processing /etc/letsencrypt/renewal/domain.conf
Cert is due for renewal, auto-renewing…
Starting new HTTPS connection (1): acme-v01.api.letsencrypt.org
Renewing an existing certificate
Attempting to renew cert from /etc/letsencrypt/renewal/domain.conf produced an unexpected error: urn:acme:error:rateLimited :: There were too many requests of a given type :: Error creating new authz :: too many currently pending authorizations. Skipping.
All renewal attempts failed. The following certs could not be renewed:
/etc/letsencrypt/live/domain/fullchain.pem (failure)
1 renew failure(s), 0 parse failure(s)
Maybe there we can see why it actually failed to renew.
(Not just the error that it has failed so many times that it’s now blocked from making new renewal requests - which tells us nothing about the real problem.)