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

I resolve the problem whit next CURL.

Register app to page:

curl -i -X POST "https://graph.facebook.com/{pague_id}/subscribed_apps?subscribed_fields=leadgen&access_token={token_id}"

leadgen field is very important

The response on my server is good!

{"id":"XXXXXXX","time":1606958566,"data":{"value":{"form_id":"7415707530XXXX","leadgen_id":"891990681XXXXX","created_time":1606958565,"page_id":"375141142501174"},"field":"leadgen"}