I am using third party applications like Hypersku and Eprolo for my products.
I set up my shipping rates for these specific platforms (so the "from" location is set to these 3rd party apps). I set up two shipping zones: Continental & Non-continental USA.
When I try to order a hypersku or eprolo product from my store, with a US address of course, I get a message error. I talked to them and they told me that everything is okay from their side.
I have other products that are not linked to any third party app so for these products, I choose shipping from my business address and it works.
Can someone help me with that ?