AbanteCart v1.4.0 is released.
Please help us to make AbanteCart Ideal Open Source Ecommerce Solution for everyone.
Did you register for a web API at this url?https://secure.shippingapis.com/registration/
Ollie, I believe there may be an issue with the extension, as of Sept 7, the UPSP has a new API. I have posted to the Admins regarding seeing if the extension needs some update. You can see at this link.http://forum.abantecart.com/index.php/topic,2673.msg11406.html#msg11406