error message when WooCommerce Shipping active

On order page where I usually can create a shipping label, I get the following message: “Unable to retrieve WordPress connection data. Please try reconnecting your WordPress connection.”

If I turn off WooCommerce Shipping, the old style shipping options re-appear, but the UI for WCShipping is not available and causes an error when activated via plugins page. My understanding is that I should have BOTH WC Shipping and WC Shipping & Tax activated, but it is causing this issue. Also, WC S&T being deactivated while WC Shipping is active does NOT solve the issue.