I have been trying to set this up and all I get is a pop-up red box that says billing strip + card not valid?
I made sure all API codes and card using is right..
Thanks for your help
Follow the instructions on how to enable Sandbox mode here: https://stripe.com/docs/tutorials/dashboard.
The method you are talking about is checking whether the card you are using to place an order is active or valid. You shouldn't comment this method since it will lead the check failure.
Zoli, before publishing the plugin, we carefully test its functionality and everything works at our test site. If you want we can test the stripe functionality directly on your site. Just PM us with your cPanel and site admin access details and we will be glad to check into this issue.