The current status as reported by the Let's Encrypt status page is Degraded Performance as at 2022-11-22 07:35:35.096 +0000 UTC. Depending on the reported problem, this may affect certificate issuance. For more information, please visit the status page.
https://letsencrypt.status.io/
Challenge update failures for sergerisse.homedns.org in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/5377149134
acme: error code 400 "urn:ietf:params:acme:error:dns": DNS problem: NXDOMAIN looking up TXT for _acme-challenge.sergerisse.homedns.org - check that a DNS record exists for this domain
The IANA public suffix is the TLD of the Registered Domain
The TLD for sergerisse.homedns.org is: org