Facebook page leadgen webhook returns error 102 Server Failure

Question

Facebook page leadgen webhook won\'t work for my page and associated app.

If I test the webhook I setup with the testing tool and click the \"Track status\" button,

Answer 1

One recent change (as of May 1, 2018) is that the app Status must be "Live" in order to receive actual webhook updates. If it is left "In Development", webhook requests will now fail with error code 102 "Server failure" (such a helpful message!), and the Webhooks page for the app (https://developers.facebook.com/apps/{your app ID}/webhooks/) will show a message saying:

Applications will only be able to receive test webhooks sent from the app dashboard while they are in development. No production data, including that of app admins, developers, and testers, will be delivered unless the app is live.

It took me a while to figure that out since the webhooks had been working previously. Hope this helps some people!