I have moved my app into production and am now getting the subject error. Since it is in production, I am using the main account's password, not the sandbox one. My config is:
{"RINGCENTRAL_CLIENTID":"Rwy3VDRaS2qvDvkmtgsGaw","RINGCENTRAL_CLIENTSECRET":"wdRJHQbQR8GfKR_xxxxxx","RINGCENTRAL_SERVER":"https://platform.ringcentral.com","RINGCENTRAL_USERNAME":"+1513794xxxx","RINGCENTRAL_EXTENSION":"101","RINGCENTRAL_PASSWORD":"<YOUR ACCOUNT PASSWORD>"}
I can log into the admin portal so I know the password is correct. Am I missing something?