"Invalid Grant" when generating an oauth token for using the API

I successfully generate the code via oauth/authorize using my client id and redirect url
then I successfully grab it during callback
and try to use it to generate the access token via oauth/token
but fail: I’m getting “invalid grant” though the code value is correct

It seems to work on another account of mine, but not in this one.

What could be the issue?

Hi @hi.walty2
Thanks for reaching out to the Zoom Developer Forum and welcome to our community!
Have you been able to troubleshoot this error?
Here is a link to a helpful guide that shows how to use Postaman to test our OAuth workflow:

Hope this helps,