Code 2013: Server to Server change from JWT

This issue has been resolved:

If anyone else is here with the same issue it may be that you’re using the Master account endpoints unnecessarily. These endpoints have the additional string /accounts/{accountId} in the URLs and will yield errors if are not calling the endpoints from an enabled Master account with sub-account relationships:

Please use the non-Master account endpoints. In this instance, for example:

USE Zoom Phone API

DO NOT USE Zoom Phone Master API