An object based on AddressErrors includes an addressLine property when validation of the address finds one or more errors in the array of strings in the address's addressLine. The returned string explains the error and should offer suggestions for how to correct it.
 
If an error occurred during validation of the address due to one of the strings in the addressLine array having an invalid value, this property is set to a DOMString providing a human-readable error message explaining the validation error.
 The text should also include, when possible, advice about how to go about correcting the error.
 If the PaymentAddress object's addressLine property was determined to be valid, this property is not included in the AddressErrors dictionary.