Hi Patryk, I am using grandnode v4.50. I am using Paypal-Sandbox account. The Payment gateway setup accepts any(even invalid one) email and PDT Key and redirecting to Paypal login page, when I checkout the cart and accepts the payment and returning to main the URL of my website, not to the checkout page. And Hope the notes added in the Paypal Payment Setup page is out dated. I didn't see any option in Paypal to get PDT key.
Hope I am insufficient knowledge of setting up the Paypal account. Could you please give me the updated steps to create PDT key at Paypal?