A test authorization for ftps.sis.tv to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
51.132.11.254: Timeout during connect (likely firewall problem)
Challenge update failures for ftps.sis.tv in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/4936430634
acme: error code 400 "urn:ietf:params:acme:error:connection": 51.132.11.254: Timeout during connect (likely firewall problem)
The IANA public suffix is the TLD of the Registered Domain
The TLD for ftps.sis.tv is: tv
6 Certificates contributing to rate limits for this domain
Serial: 298921407657929629126113636766716049144580
NotBefore: 2022-10-31 05:05:35 +0000 UTC
Names: [cfmt.dev.sis.tv]
Serial: 367843215916978930532568925966521960512019
NotBefore: 2022-10-31 05:05:35 +0000 UTC
Names: [feedsmgmtool.cfmt.dev.sis.tv]
Serial: 384726197850822221645624569501086635502952
NotBefore: 2022-10-27 10:22:21 +0000 UTC
Names: [automation-api.dev.sis.tv]
Serial: 294490566267844884088555501743955647045845
NotBefore: 2022-10-26 20:42:06 +0000 UTC
Names: [api.sis.tv]
Serial: 329004066263452767336631460742676597851531
NotBefore: 2022-10-26 20:41:51 +0000 UTC
Names: [auth.api.sis.tv]
Serial: 272532347460577291948925521811918977288806
NotBefore: 2022-10-26 20:27:23 +0000 UTC
Names: [racing.api.sis.tv]
The current status.io status for Let's Encrypt
Operational