We are implementing the shipping API from Shippo. On exports everything seems to work, but on import we get the following error from UPS in test mode:
120120: Hard: The country associated with Shippers ShipperNumber must be the same as the shipments Shippers country.
We did notice the same error reported on the UPS developer forum, but no solution was given. Shippo say UPS must enable import on my account. UPS says:
Your account is active and enable for every function.