I'm using the Payflow Pro module from https://www.zen-cart.com/downloads.php?do=file&id=212

It works well overall... however occasionally, (like today Nov. 30), a customer will get an error on checkout, however their transaction has actually completed successfully and we received the payment.

On my side, from ZenCart admin, I get this email:

Dear store owner,
An error occurred when attempting to initiate a PayPal Express Checkout
transaction. As a courtesy, only the error "number" was shown to your
customer. The details of the error are shown below.


Zen Cart message: 0 -

Transaction Response Details: Array

Has anyone encountered this?

Most of the time, the module is working fine and I'm successfully getting payments/and orders via PayFlow Pro gateway.

Thanks much,