Why is "carrier-calculated shipping registration failed" appearing when creating FedEx labels on Shopify?

This message typically appears when Carrier-Calculated Shipping isn't enabled on your Shopify plan, which is required for third-party apps to display live FedEx rates at checkout. Enabling this feature through your Shopify plan settings, then completing the app's registration step, usually resolves it.

If you want a reliable way to confirm this registration is complete on your Shopify store, PH Ship, Rate & Track for FedEx includes a clear registration status indicator so you can verify live FedEx rates are properly enabled.