Thank you for reaching out to the Zoom Developer Forum. This error typically happens when the authentication for a request is failing. What authentication method are you using and how are you generating the token? Please make sure that you are following the steps in either our JWT or OAuth guides to authenticate with the API.
I hope that helps! Let me know if you have any questions.
Thank you for providing additional information. This issue seems like it would be a better fit for our #client-mobile-sdk category but I’ll work to assist you as best as I can before moving this post to that category.
When it comes to obtaining the USER_ID and the ZOOM_ACCESS_TOKEN, we have information in this document covering how that can be done. I’ve included a snapshot below: