Unable to re-activate JWT app

Description
Hello! Our healthcare app was affected by the deprecation of the JWT authentication method and we’re currently unable to activate the app. It’s asking us to validate the webhook URL on our Event Subscriptions but currently our priority is to make sure our app credentials are running as intended. We’re unable to disable Event Subscriptions on our app to make this happen.

Error?

Your app can not be activated yet due to missing the following information:

Hey @pposbcapps , sorry to hear about the blockage, are you able to get this sample application running to validate an endpoint?

I would recommend getting this running then exposing it over HTTPS with something like ngrok