My IPN setting was correct and it was working fine. I went to PayPal website yesterday and made some subscription buttons but I haven't added them to my website yet. I also haven't changed "listener.php" file. Today I noticed I'm not receiving IPN messages anymore. When I went to PayPal website and checked IPN setting, it shows: Message Delivery is Enabled. when I click on "Edit Setting" button and go to setting, it shows "Receive IPN messages (Enabled)" is selected but when I click on "Save button" it shows me: "We were unable to validate the URL you have entered. Please check your entry and try again." Error. Does anybody know what should I do?
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