Thanks for answering. On the same day I was able to create the webhooks. I identified where the error is and how to avoid it: When you click the accept cookies button, the URL's GET variables disappear, so, just DONT click on this button to accept cookies and work normally. As the system uses Ajax to validate information and change urls, this loss of variables breaks the JS code. The Paypal developer system is very good, just this little mistake that gave me a bit of a headache but now I am working normally on my projects. Thanks!!
... View more