I am recieving the below error when testing in the API explorer. Any idea what the issue is?
Request: curl --request POST \ --url 'https://platform.devtest.ringcentral.com/restapi/v1.0/account/~/extension/~/sms' \ --header 'accept: application/json' \ --header 'authorization: Bearer xxxUFIRQ' \ --header 'content-type: application/json' \ --data '{"from":{"phoneNumber":"+13236483519"},"text":"hello world","to":[{"phoneNumber":"+15514042223"}]}' Response:{ "errorCode": "FeatureNotAvailable", "message": "The requested feature is not available", "errors": [ { "errorCode": "MSG-242", "message": "The requested feature is not available" } ] }