CC-Avenue Payment Gateway Response Page return 404 error?

[aveeva]

Here is my code :

https://paiza.io/projects/SUiG5qp_wttfcrQn-0Mwew?language=php FYI -> [index.htm -> LineNo : 781 & 782]

After successfully received payment response page return 404 error

The form & CC-Avenue Payment Gateway Request page working good, after customer paid the response page return 404 error.

How can i solve the error?

[chorn]

Don’t redirect to an URL that doesn’t exist.

[astonecipher]

The redirect URL you are referring the user back to is, https://abc.in/ccavResponseHandler.php. Is that a valid URL?