A test authorization for sergerisse.homedns.org to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
217.162.124.104: Timeout during connect (likely firewall problem)
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/