SSL issue error 400

[beofme]

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: maxwellenglish.co.kr

I ran this command: There was a problem processing your request

• Error issuing certificate
• Failed to issue certificate
• Updating challenge for maxwellenglish.co.kr: acme: error code 400 "urn:ietf:params:acme:error:dns": DNS problem: NXDOMAIN looking up A for maxwellenglish.co.kr - check that a DNS record exists for this domain; DNS problem: NXDOMAIN looking up AAAA for maxwellenglish.co.kr - check that a DNS record exists for this domain (order URL: https://acme-v02.api.letsencrypt.org/acme/order/1163146937/272961777552)

It produced this output:

My web server is (include version):

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

My hosting provider, if applicable, is:

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

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

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

[linkp]

Did you let your domain expire?

query : maxwellenglish.co.kr

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The requested domain was not found in the Registry or Registrar’s WHOIS Server.

- KISA/KRNIC WHOIS Service -