I created JWTfor sandbox, created app with authorization type jwt, but I have error like that when I try to request.
With Oauth it works fine.
What can be the problem?
Yes, JWT Authentication type does not work for API Reference tool. You can suggest this as a feature if you'd like.
At this moment, you will have to change to one of the other two Authentication types for your application in order to call the APIs from the API Reference tool. If your application is in 'Sandbox' environment, you can login to RingCentral Developer Console --> App --> Settings --> Auth Type (change it to one of the two below). If your application is in 'Production', file a service ticket for our developer support team and they can add or change the Auth type for your app.
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