I am a GoDaddy user trying to setup PayPal Express. This is a new install of Zen Cart 1.3.8a. and I have PHP Version: PHP 4.x and MySQL Database 5.0.
I am using the PayPal Sandbox for testing. I have “FREE SHIPPING!” enabled. I have set up only one tax zone definition while testing.
My PayPal transactions are not completing. I have PayPal debug mode enabled and each try generates about 40 email responses and the first error message shows up around the 30th one. Everything seems to work up until I press the “pay now” button on the PayPal site.
I am getting the following error message: 10413 Transaction refused because of an invalid argument. See additional error messages for details. - The totals of the cart item amounts do not match order amounts.
I have set “CURL Proxy Status = false” and had the same result. I tried the workaround to the /includes/modules/payment/paypal/paypal_functions.php. This did not work either and I have reverted to the original file.
I have probably just missed something, but I can’t find it. I hope you can help.
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