Shipment Tracking Plguin
TrackShip for WooCommerce require that you’ll use one of the following shipment tracking plugins to add tracking information to orders:
WooCommerce REST API enabled
The WooCommerce REST API should be enabled in your store.
Your store should be protected with SSL certificate, (HTTPS), Make sure that WordPress Address & Site Address are with HTTPS in
Settings > General
Pretty permalinks in
Settings > Permalinks is required so that the custom endpoints are supported. Default permalinks will not work.