We have built an API endpoint using Firebase Functions (https://faggro.com/upi) and deployed it on Cloud Run. When tested via Postman, the endpoint is accessible and working correctly.
However, when the UPI team attempts to call this endpoint to send a payment success callback, they receive a 403 Forbidden error with the following exception:
Exception Occurred: Exception thrown as class java.net.ProtocolException with message Unrecognized response from SSL proxy: 'HTTP/1.1 403 Forbidden'
