I have tried printing a DHL Parcel UK shipping label and am seeing an error returned:

Validation failed. Service is invalid because it is not available for the Account Postcode. 


The error means that either the service cannot be used for the specified destination, or the service is not available for your DHL Parcel UK account. Please try using an alternative service and if the error persists, please get in touch with your DHL Parcel UK account manager to confirm the availability of the service for your account.