Unable to register webhook URl with Asana

Team, When i try to register webhook I am getting below error:

{
    "errors": [
        {
            "message": "The remote server which is intended to receive the webhook did not respond with the handshake secret.",
            "help": "For more information on API status codes and how to handle them, read the docs on errors: https://developers.asana.com/docs/errors"
        }
    ]
}

What kind of changes I m supposed to do o webhook side?

I am hitting URI :

https://app.asana.com/api/1.0/webhooks

NOTE: Webhook is hosted on Snaplogic and this was not a issue before. This has started recently.

@anon79111662,

You’ll need to implement the handshake as documented here: https://developers.asana.com/docs/webhooks-guide#the-webhook-handshake

That error message means that Asana is not receiving the handshake response back from your app.