Do you see this when using the Sample Web App? If so, please make sure that you are passing in a valid API Key and Secret. From what I can see, you are using the correct API Key.
If that doesn’t help, please send an email to developersupport@zoom.us with a link to this thread. In that email, please include the signature that you’re using.
Hi, @jitendra301979,
Thank you for sharing that information. To align with best security practices, please either omit, email or direct message any Personal Identifiable Information ( PII ). To that end, it looks like you are passing in a JWT. Instead, you should be passing in a valid API Key here and Secret here. The API Key and Secret (see screenshot below) can be found on the App credentials page of your JWT App in Zoom Marketplace.