Let's Debug

Test result for queue-syd.shop.samsung.com using tls-alpn-01

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

Submitted Jul 14 08:21:57 2020. Sat in queue for 2ms. Completed in 7s. Show verbose information.