> it turned out I am blacklisted from requesting new certs for 7 days, per their rate limits The rate limit for failed issuance is one hour, not 7 days. The 7

> it turned out I am blacklisted from requesting new certs for 7 days, per their rate limits The rate limit for failed issuance is one hour, not 7 days. The 7 day rate limit applies when you successfully issue 5 identical certificates; then you have to wait 7 days more to issue a new identical certificate. https://letsencrypt.org/docs/rate-limits/ https://letsencrypt.org/docs/rate-limits/ It's unlikely that you would be subject to the 7 day duplicate certificate limit due to a Certbot dependency problem, because the dependency problem would have to allow Certbot to obtain the certificates correctly but fail to save them properly. (Source: I'm a Certbot developer.) I should also add that I'm really sorry that you experienced an installation problem on CentOS. Dependency and packaging problems continue to be a challenge for Certbot and our colleagues are still trying to find a more universal solution to them (probably involving snaps).