Thanks for the response @pfaffman . http:// is working fine, but ssl fails to work when enabling Let’s Encrypt. Even though I set LE up via a fresh install, I gave the Setting up LE tutorial a read and didn’t see any mention of DNS modifications.
What specifically do I need from the DNS side to allow LE/SSL to work?
Here is a screenshot from my DNS setup:
(DKIM/SPF has been validated and Discourse mail is working well, just fyi)