Absolutely PERFECT and solved the issue. Thank you WES!!
There were numerous complaints all over on the Genesis FB page, and the Studio Press Community Forum..all with the same complaint.
I posted there the solution (I pasted your reply, if you don’t mind) to assist others.
Sad that they rolled out this without a clearer game plan. Yesterday I spend hours trying to find the error… and found a work around (directly pasting the URL in the style.css for the .front-page-1. However that did not restore functionality to the Customizer. Your fix has done that. Thanks again!!