I followed the documentation, created the a server to server oauth app, called the oauth endpoint with client id and secret to get access token, and subsequently called meeting API with Authorization: Bearer <access token>. However I am getting {'code': 200, 'message': 'Invalid api key or secret.'}, what am I doing wrong?

hola , tengo tiempo usando zoom para mis clases pero desde hace unos meses no se que ocurrió doy clases de música y  ahora en mi clase me dicen los alumnos que no se escucha mi guitarra , no la conecto a ninguna consola ni nada, pero zoom me suprime el ruido externo , ya fui a configuración y le doy la opción de sonido original para músicos pero aun asi no se escuchan los instrumentos.

que puedo hacer? ayuda por favor!!!!

Although worked fine in the past. I am not getting sound from my MacBook Pro speakers during a zoom meeting. I tried my headphones and they worked fine. I disconnected bluetooth and tried again...no sound from speakers. Tried help topics at Apple and Zoom, no solutions found. Quit Zoom, signed in again, no change. Updated software, no change. 

I tried to update the Zoom app on an elderly, home-bound friend's Galaxy tablet but got into an unending circle of messages that I had updated the app to following refusals to connect to a Zoom meeting because the app needed to be updated. My friend's account shows that she has Zoom version 5.4.9 (1079) in spite of my efforts to update it to at least version 5.8.6. What is the problem? Perhaps that the tablet is too old/too limited in memory or whatever to update? Help, please! Zoom is one of the few ways my friend can still connect with others directly.