PayPal Express Checkout - Blank Page on Confirm
My site is displaying a blank page when using PayPal Express checkout to process orders. Users click to checkout on paypal, and, when prompted to confirm on our site, they are given a blank page.
I have followed trouble shooting steps found in other threads on this forum. The message that appears on my blank page is "A successful transaction has already been completed for this token." It also appears at the top of the pp_confirm.php page prior to clicking the submit button to complete checkout.
Does anyone know how to fix this issue? I would appreciate any help you can provide.