This error (Please select a contract for your shipment before registering with the carrier) from MyParcel typically occurs when the wrong service is selected for the weight of the order or the destination.
To resolve this issue:
Check the Service: Ensure that the selected service is suitable for the weight and destination of the order.
Need Assistance?: To find out more about which service can be used, please reach out to MyParcel for further clarification.
By verifying the service and weight requirements, you should be able to resolve the error.