Hi, I am not able to validate the IPN I am getting after completing a sale in the sandbox environment. The URL I'm using is: https://ipnpb.sandbox.paypal.com/cgi-bin/webscr I have also tried what I think is the old one: https://www.sandbox.paypal.com/cgi-bin/webscr It throws a 404 error code. Is there something wrong with the url? Thank you
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