I have a site in OpenCart, UPS and USPS modules are already there as OpenCart default. I have already filled up with proper data, but still getting error on checkout page.
"United Parcel Service
111057: This measurement system is not valid for the selected country.
United States Postal Service
Authorization failure. Perhaps username and/or password is incorrect."
See attachment.
I don't know what's going wrong. You need to set it properly.
You also need to tell me how you fix it.
Thanks.
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