Let's Debug

Test result for nxtcld01.ad.kellerautomation.com using http-01

NoRecords
Fatal
No valid A or AAAA records could be ultimately resolved for nxtcld01.ad.kellerautomation.com. This means that Let's Encrypt would not be able to 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 nxtcld01.ad.kellerautomation.com is: com
StatusIO
Debug
The current status.io status for Let's Encrypt
Operational

Submitted Dec 28 14:55:35 2021. Sat in queue for 2ms. Completed in 0s. Hide verbose information.