We have created an app 'Webhook Notifications with JWT' for missed calls and voicemail notifications. We have authenticated the app using JWT auth. The subscription's ID is
The delivery address in the webhook is ngrok. The webhook seems to work perfectly but then after some time it gets blacklisted.
The reason is 'Webhook responses with code: , reason: [Not Found]'. Is there any way to check the reason behind a subscription getting blacklisted? And how do I keep my subscription from getting blacklisted?