oAuth2 Authentication for Zoom Room Schedule API

Hi @pempeigne

Thanks for reaching out to the Zoom Developer Forum and Welcome to our Community!
Yes, we are going to be deprecating the JWT app next year in June and we are encouraging developers to start migrating their JWT apps to our Server-to-Sever OAuth app.

Here is a guide on How to use the new Server-to-Server app

Your error might be happening because you are using an OAuth app instead of the Server-to-Server.

Let me know if this helps!
Cheers
Elisa