When you see webhook errors (e.g., "POST to webhook target URL failed with non-2xx response code 404"), follow these troubleshooting steps:

1. Basic Requirements:

• Ensure your HTTP service is running before registering the webhook

• Configure your endpoint to return 200 status codes for successful receipts

• Use standard ports (80 for HTTP or 443 for HTTPS only)

2. Common Solutions:

• Verify your endpoint is publicly accessible

• Check for proper response codes

• Ensure proper port configuration

• Monitor webhook logs for detailed error information