The "free shipping coupon" causes an error with the last version 3.8.5 of the plugin :
SetExpressCheckout API call failed. Detailed Error Message: The totals of the cart item amounts do not match order amounts. Short Error Message: Transaction refused because of an invalid argument. See additional error messages for details. Error Code: 10413 Error Severity Code: Error
Has one of you experienced this and solved it ?
Thanks a lot.