No resolver defined to resolve r3.o.lencr.org while requesting certificate status, responder: r3.o.lencr.org, certificate

[jsbryans22]

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is: btc.lorsenltd.co.uk

I use BTCPay server

My web server is (include version): Ubuntu 20.04.2 LTS

The operating system my web server runs on is (include version): Ngnix

My hosting provider, if applicable, is: Balzingfast

I can login to a root shell on my machine (yes or no, or I don't know): yes

I'm using a control panel to manage my site (no, or provide the name and version of the control panel):no

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):

[JuergenAuer]

Hi @jsbryans22

please explain your error:

No resolver defined to resolve r3.o.lencr.org while requesting certificate status, responder: r3.o.lencr.org, certificate

When do you see that error? Which instance? You have root access, your webserver doesn't work, there is a proxy.

The proxy Letsencrypt certificate is valid, without the "Must staple" extension. May be that proxy hasn't a correct dns resolver (but that's speculative).

[jsbryans22]

Yes I have root access to my server is my VPS. I run on it BTCPay Server which is come with letsencrypt-nginx-proxy-companion:1.12.2 . this module create the cert.

[Osiris]

This is due to nginx trying to get OCSP responses, but is unable to because there is no DNS resolver configured in nginx. Please read the following resolver directive.