I'm facing a cumbersome issue when trying to create my WebHook Subscription via POSTMAN to my sandbox account. I have deployed a service on AWS that can be accessed:
Furthermore, it passes all TLS/SSL checks as shown here:
I have implemented also the Validation-Token check and return as explained in the docs and as showcased in all the NodeJS code samples.
Whenever I call the API
I always keep getting the SUB-525 Webhook server response is invalid
What is puzzling to me is that my server is never logging such requests made by the RingCentral servers. And I have logs on every entry point of such webservice.
This is very puzzling...
Please could you please guide/help me address this issue since as you can tell, if you test using POSTMAN or cURL, you will notice that all my requirements have been met to register my webhook.
Any advice is welcomed.