Square Payment Module for Zen Cart [Support Thread]

[DrByte]

Okay, I figured it out :)

For those who may encounter the same problem, make sure your Redirect URL includes /square_handler.php. This information is NOT included in the instructions on the Square website, which were the ones I was following (it IS in the Zen Cart instructions).

Thanks for posting back.
I note that the correct Redirect URL is also displayed in your Zen Cart Admin's Square page, near the Token Authorize button.