"sbcsepla.org" is not a valid domain name that Let's Encrypt would be able to issue a certificate for.
Domain does not exist in DNS - have you registered this domain name?
No valid A or AAAA records could be ultimately resolved for sbcsepla.org. This means that Let's Encrypt would not be able to connect to your domain to perform HTTP validation, since it would not know where to connect to.
No A or AAAA records found.