Zend certified PHP/Magento developer

Magento 2.3.3 – Shipping Methods Issue

We are unable to get any Shipping Methods to show on customer check out.

Checking out as a guest (call to estimate-shipping-method) or as a registered user (call to estimate-shipping-method-by-address-id) are returning empty arrays.

According to this... I am missing the email and region_code as required in the payload.  On our live site the exact same payload is being delivered and working fine, missing those two attributes.  We are upgrading a stage site to Magento 2.3.3 and the customer wants to remove the one-page checkout and use the default Magento check out.

We have tried many of the fixes found through research and nothing seems to be helping at this time.  I am not sure what information you will need, so please feel free to ask and I will update with the information as soon as I am able.