A test authorization for queue-syd.shop.samsung.com to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Error creating new order :: Cannot issue for "queue-syd.shop.samsung.com": The ACME server refuses to issue a certificate for this domain name, because it is forbidden by policy
Order creation error
acme: error code 400 "urn:ietf:params:acme:error:rejectedIdentifier": Error creating new order :: Cannot issue for "queue-syd.shop.samsung.com": The ACME server refuses to issue a certificate for this domain name, because it is forbidden by policy
The IANA public suffix is the TLD of the Registered Domain
The TLD for queue-syd.shop.samsung.com is: com