TroubleShooting and Common issues

The plugin didn’t return any shipping rates.

Update the plugin to the latest version.
Make sure that the plugin and the shipping method is enabled
In the checkout page, make sure that you fill all the required address fields, especially the postcode.
You may need to select the medium parcel from the “First / Second Class Parcel Size” option.

You fixed a problem in the shipping rates and still, the plugin didn’t return any rates.

Go to WooCommerce » System Status » Tools » Then click on the `Clear transients` button.