Zen Cart / Security hash Warning

Upgraded from 1.2.6 to 1.3.8a last week. Things seemed to be fine then a recent customer received this:

"warning-security hash-your order may not have been authorized, contact store owner immediately".

Is this a problem on the Authorize.net side that I have to fix or something with the Zen Cart payment module? Or both??

Thanks

After an upgrade you need to uninstall and reinstall any payment and shipping modules so that you are using the most recent code. You will have to re-input your account information.

Related FAQ: https://www.zen-cart.com/tutorials/i...hp?article=373