Adding webhook with ngrok works fine but receives CRC error for node api hosted on AWS

[dssagar93]

I built a full-fledged application using webhook ui using ngrok. Now I deployed my Node JS API to aws on a custom domain and tried adding the same URL for the webhook and it throws Non-200 response code during CRC GET request (i.e. 404, 500, etc).
Any help will be appreciated.
P.S- I did add all the new URLs to the developer portal.

[dssagar93]

Can someone tell me what are the steps to do that? I already have my API deployed, I need to register my webhook URL.