A subdomain was created pointing correctly to a LoadBalancer working perfectly with a droplet, on port 80.
But when trying to configure for https and obtain a LetsEncrypt certificate, “NO SENSE” failure occurs.
Failed to validate nameserver records: one or more DigitalOcean Name Server not found for domain.
It seems to me, searching the web, that this type of problem has already occurred in the past.
I opened a ticket but so far with no answer.
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.