I've created a Facebook app, linked it with a business, submitted and passed review, the business is verified, contracts signed, the app has leads_retrieval permission, the app status is now live.
I can test it under the webhooks link in the side menu, my end point receives the test data from Facebook. The data shown below is received by my server.
When I test using the lead ads testing tool I instantly get a 102, server error, and nothing is received by my server. See below for the message.
I've spent so long getting to this stage and every step has been painful!
Can anyone suggest why using the lead ads testing tool results in an error and what I can do to resolve the issue.
Cheers