This action can be applied on your Shipping details to be in the acceptable format
Shipping details should to be written in a way that each parameter is delimited with ::: Country, Service, Price, Currency.
In case your feed contains the shipping details in the following way:
Use the action of Extract objects { } :
Don't forget to Save the version.
NOTE: The required formatting could be different for some countries. To read more about the shipping attribution format click here.