Zend certified PHP/Magento developer

Magento 2.3.4, Checkout has no shipping Methods, and no way to continue

My Magento 2.3.4 site, has an error I cannot identify. The Checkout process has no shipping methods, and has no way to continue. You can enter or select an address, but the shipping methods are blank, and there is no way to proceed to the next step.

I can find nothing in anything in any logs, and I don’t know what this could be, or how I can troubleshoot this. I can provide additional details on request, and will post them right away.