unable to access checkout page

Site URL: http://www.jeffkrueger.net

I am new to Squarespace and building a commerce site in 7.1.  The site has not been launched yet.

Recently I have been unable to get to the checkout page from my shopping cart.  In the past this was not a problem. Now I am getting a page that reads,

Quote

 

Private Site

This site is currently private. If you’re the owner or contributor, log in.

 

And when I follow the log in link I get a 404 message.

I tried different browsers as I thought Firefox ad/popup blockers might be the problem.  Same result.

I tried Commerce test mode on and off.

My SSL certificate is active.  Though I had troubles initially getting SSL set up when I set up my Domain Managed by Third-Party.

Any troubleshooting suggestions would be most appreciated.