I have a clue as to why Im getting this. My domain, imaynerobotics.com is registered with Gandi. I changed the nameservers to use Netlify’s. That works fine. I have an app with Heroku that uses api.imaynerobotics.com. I’ve installed their free ssl. I’ve used their DNS Target in Netlify’s domain settings for CNAME with value api, so the domain is api.imaynerobotics.com. How to resolve this?
You can check here: https://www.ssllabs.com/ssltest/analyze.html?d=api.imaynerobotics.com
Some images:
Heroku:
Netlify

