The domain clonimi.com is being served through Cloudflare CDN. Any Let's Encrypt certificate installed on the origin server will only encrypt traffic between the server and Cloudflare. It is strongly recommended that the SSL option 'Full SSL (strict)' be enabled.
https://support.cloudflare.com/hc/en-us/articles/200170416-What-do-the-SSL-options-mean-
An internal error occurred while checking the domain
Failed to query certwatch database to check rate limits: pq: canceling statement due to user request
Challenge update failures for clonimi.com in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/7491722334
acme: error code 400 "urn:ietf:params:acme:error:dns": DNS problem: NXDOMAIN looking up TXT for _acme-challenge.clonimi.com - check that a DNS record exists for this domain
The IANA public suffix is the TLD of the Registered Domain
The TLD for clonimi.com is: com
The current status.io status for Let's Encrypt
Operational