I am having a problem with instant payment notification using the PayPal standard plugin. I have a separate thread regarding the error that occurs when I have PayPal set to handle the return notification.
I want to try having nopCommerce handle IPN and see if that fixes the issue. The directions on the Configure - PayPal Standard page state that the first method to enable receiving IPN notifications is to check the "Enable IPN" box. When I do that it opens a text box for entry of the "IPN Handler". Do I leave that blank or must I enter something? What do I enter if that field is required?
The problem started when I upgraded from version 3.7 to 3.8.