I still don’t know the issue. but it was definitely on the server side. Looking back, 2 things may have had something to do with this.
First, Although Genesis updates regularly, the child theme hadn’t updated in 2 years.
Second, the Pretty Links in two sidebar ads were sources of “failed to load” errors.
The rep at Bluehost managed to clear it up.
Now I can get back to customizing the site.
Thanks for all you do.