POST /webhooks -> Confirmation request failed!

[ProductOfAmerica]

Original Request

Body:

{
  "events": ["fieldCreated"],
  "name": "Name Here",
  "secret": "mySecret",
  "url": "https://www.myurl.co/leaf/satellite"
}

Response:

{
    "type": "https://docs.withleaf.io/alerts_endpoints",
    "status": 400,
    "path": "/api/alerts/webhooks",
    "message": "Confirmation request failed! Webhook returned a non 2xx successful status code. Actual response was: 404 )",
    "errorKey": "non2xxSuccessfulStatusCode",
    "entityName": "Webhook"
}

Weirdly, not including the www returns a 307 (e.g.):

Body:

{
  "events": ["fieldCreated"],
  "name": "All listeners 3",
  "secret": "mRyT257XpFWX",
  "url": "https://myurl.co/leaf/satellite"
}

Response:

{
    "type": "https://docs.withleaf.io/alerts_endpoints",
    "status": 400,
    "path": "/api/alerts/webhooks",
    "message": "Confirmation request failed! Webhook returned a non 2xx successful status code. Actual response was: 307 )",
    "errorKey": "non2xxSuccessfulStatusCode",
    "entityName": "Webhook"
}

This was working not 30 minutes ago, no problem, I was adding webhooks fine. Now all of a sudden, getting 400 errors. I changed no code. The service just stopped working.

Using: https://api.withleaf.io/services/alerts/api/alerts/webhooks

[ProductOfAmerica]