Let's Debug

Test result for solv.sec.samsung.net using http-01

ReservedAddress
Fatal
A private, inaccessible, IANA/IETF-reserved IP address was found for solv.sec.samsung.net. Let's Encrypt will always fail HTTP validation for any domain that is pointing to an address that is not routable on the internet. You should either remove this address and replace it with a public one or use the DNS validation method instead.
10.199.2.15
HTTPRecords
Debug
A and AAAA records found for this domain
solv.sec.samsung.net. 0 IN A 10.199.2.15
PublicSuffix
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for solv.sec.samsung.net is: net
StatusIO
Debug
The current status.io status for Let's Encrypt
Operational

Submitted Oct 19 00:13:34 2021. Sat in queue for 7ms. Completed in 4s. Hide verbose information.