Let's Debug

Test result for api.kriptokng.com using http-01

InvalidDomain
Fatal
"kriptokng.com" 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?
NoRecords
Fatal
No valid A or AAAA records could be ultimately resolved for api.kriptokng.com. 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.
PublicSuffix
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for api.kriptokng.com is: com
StatusIO
Debug
The current status.io status for Let's Encrypt
Operational

Submitted 23h33m2s ago. Sat in queue for 1ms. Completed in 0s. Hide verbose information.