When you are attempting to ship via DHL, you may see the error "The destination location is invalid. Please check the data.. Data error. Failure - request".
This is an error that ShipHero receives directly from DHL. The error means that the shipping address is invalid.
Users can use DHL's "Get a Rate and Time Quote" at https://mydhl.express.dhl/us/en/home.html#/getQuoteTab to understand which part of the address needs to be fixed.