Thank you for reaching out to the Zoom Developer Forum. It seems like this may be an issue with the implementation you have. Are you logging the requests that your server is receiving? I would first check there to see if perhaps the file isn’t being written as expected.
If that doesn’t help, please try to test with a tool such as Request Bin to confirm if the expected data is coming through on those Webhook events. Comparing that with what you’re seeing written to the file will help us to confirm if the event is empty or the issue is related to the endpoint code.
I hope that helps! Let me know if you have any questions.
You are right. The issue come from Wordpress I think. I look on another forum and found that I need to get the body data with this method: file_get_contents(‘php://input’).