Security issue on initial access to Gramps installation hosted by Digital Ocean

[If I’m asking this in the wrong place, please accept my apologies and redirect me.]

I am brand new to GrampsWeb, and followed the directions for deploying on Digital Ocean. I created a domain on DuckDNS, let’s call it newbie.duckdns.org. I ssh’ed to my “droplet”, entered the DNS name, and installation seemed to proceed normally.

I then, from my browser (firefox on PopOS, an ubuntu variant), entered https://newbie.duckdns.org, and saw: Warning: Potential Security Risk Ahead …

A similar problem occurred using the Brave browser.

Has anyone else encountered this?

Double check your DNS set-up or check the docker logs. Either you didn’t set it up correctly or obtaining a certificate failed for some reason.