Enable RTMS (startRTMS) for App ID: hBgpAVvSk6w2_H9ytSx_w

am developing a Zoom App using startRTMS. I am using the latest Zoom Client (6.x) and SDK. My code calls startRTMS() successfully, but I never receive the meeting.rtms_started webhook. I also see the warning ‘Method version is not available…’. Please enable RTMS / Realtime Media Streams for my App ID: hBgpAVvSk6w2_H9ytSx_w