Every time we try to add the tracking number to an order we get the error:
Invalid line item ID: "XXXXXXXX"
The problem is that the lineItemId is correct.
What is the cause of this error?
Thanks for your help
I don't think that's the problem..
My images are all jpg or png
The problem I have is that when a product is sold I try to update the shipping information by adding the tracking number but I get the error "Invalid line item id".
Obviously the "item id" that I pass to the fulfillment api is correct..
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