Zoom and Marketing cloud Integration not working

[SudhaK]

We exclusively rely on a Webhook-only application to capture Webinar Registrations data.It was working smoothly. However, we've observed a sudden halt in data transmission  to our Marketing Cloud data extension. No modifications were made on our end within the Marketing Cloud platform.

Deployment : 2023-10-10 . No data coming since : 2023-11-05 

In an attempt to troubleshoot, we re-validated the endpoint, only to encounter an 'Please validate your endpoint URL' error message.Zoom support team indicated a potential issue with the hash value, but it puzzles us why this discrepancy arose now when the system operated flawlessly last year.

Interestingly, we noticed two records were captured in the Marketing Cloud data extension recently, but upon personal testing, the system remains unresponsive.

Are there any recent updates pertaining to hash response mechanisms, particularly HMAC-SHA, that could shed light on this issue?

[SudhaK]

Please inform me if anyone has encountered a scenario similar to this