How to report a Mage2.PRO extension's issue? (duplicate)

got this notification message from Stripe concerning failing webhook:
The webhook I used is as directed by your tutorial.

An Excerpt of the message:
We’ve attempted to notify the endpoint 72 times since November 30, 2017 at 08:07AM. If this endpoint is important to your application, please try and fix the issue. If you do not need the webhook endpoint you can delete it from your Stripe webhook settings. We will stop sending notifications to your webhook by December 9, 2017.

One recent call to your endpoint returned an HTTP status code 302, with a redirect to mydomain/checkout/onepage/success/.

Can you help figure this out.

How to report a Mage2.PRO extension’s issue?