Add SSL certificate to subdomain

[Melvin]

Hi @Viblio,

Thanks for reaching out and welcome to the Netlify Support Forums!

Visiting the site, I see you have a DNS Zone configured for viblio.com, however, it is inactive:

dig viblio.com NS +trace | tail -n 6
;; Received 732 bytes from 192.48.79.30#53(j.gtld-servers.net) in 14 ms

viblio.com.		1800	IN	NS	dns1.registrar-servers.com.
viblio.com.		1800	IN	NS	dns2.registrar-servers.com.
;; Received 95 bytes from 2610:a1:1025::200#53(dns2.registrar-servers.com) in 33 ms

We have a Support Guide on how to detect and fix a inactive DNS Zone here:

[Support Guide] How to detect and fix inactive Netlify DNS zones

Last reviewed by Netlify Support - August, 2023 What is an “inactive Netlify DNS zone”? First, it would help to define the term “DNS zone”. Quoting wikipedia, it says: A DNS zone is any distinct, contiguous portion of the domain name space in the Domain Name System (DNS) for which administrative responsibility has been delegated to a single manager. To paraphrase, a DNS zone is a collection of all the DNS records for a production domain. When you add production domains to Netlify DNS we c…

I do see that you have viblio.com and www.viblio.com configured for External DNS, so you can remove the inactive DNS Zone by following the solution here.

Please let us know when you’ve removed the inactive DNS zone and double-checked the Support Guide for configuring branch subdomains without Netlify DNS.