The order is placed and the payment goes through, but the user just sees a blank page (FF) or a generic 500 message (Chrome). When renewing the page, the message is
A successful payment transaction has already been completed. Please, check if the order has been placed.
Other payment methods are fine.
Cannot see any error messages in the payment.log
Nothing relevant I can see in system.log or exception.log
Getting some emails from Paypal about a failed payment.
How can I troubleshoot this?
upd: the apache2 log shows many errors with aws and amazon pay – can these be disabled if not used?
