Your Connection is not private error

Hi everyone - I am trying to set up Ghost custom domain however although this is connected on Ghost dashboard, I am getting the error in below: Your Connection is not private. And if I advance, it says the site was redirected too many times

I own domain through Google Domains

Hence I set up in Host and as the domain name for the website. Appreciate the help

It looks like the domain that works is: ""

The “www” prefix is rarely used anymore. I would just not use the “www.” prefix version.