Accessing site without www

My app’s URL:

If I try to access the site with a www prefix I get a privacy error … how can i resolve this so that people can access my site with the www ?

Using www, it’s coming up with Glide’s certificate instead of your own. I haven/t done any of this myself, so I can’t provide much advice. I’ve guessing it’s a setting somewhere, or you need to set up a redirect as is indicated in this post.