DPS Hosted PX Pay now redirects to an error page

Store URL: http://membership.howickclub.co.nz/membership-renewal/

WordPress version:3.9.1

WP e-Commerce version: 3.8.14.1 also have DPS PxPay Gateway for WP-e-Commerce version 1.0 to use DPS.

Gold Cart version: none

Theme: Catalyst 1.5.4

I did this: Added product to cart clicked checkout button, filled in fields. Click purchase button.

I expected WP e-Commerce to do this: Redirect to DPS page to enter credit card details.

Instead it did this: Redirects me to DPS error page with “Error
NM
An error has occurred. Please try again.”

What I have done to before posting here: This checkout was broken before any updates so everything was updated to check for a fix. But apart from updating no information has changed in the settings since it was last working and update retained all the information. Unable to find anything on the DPS add-on plugin apart from your purchase page. Which I used your update page to request a new update of this incase that was the issue and was sent the same version so at this point posted here.

https://wordpress.org/plugins/wp-e-commerce/