Every time I try to upload documents for identity and address verification a pop up appears saying "additional document back file upload cant be blank" even though there is no option to upload an additional document back file.
I have the same issue too. No matter what i try, i get the same error message ""additional document back file upload can't be blank".
It gives me no option to add a back file.
Sophia here from Shopify. If any of you are still having trouble uploading a document to your admin for verification purposes, please try toggling the driver's license field to another option and then back again. This should reveal the second document upload option. Our team is looking into fixing the form so you don't need to toggle back and forth, but in the meantime, this workaround should resolve the issue.