Invalid Token! (invalid_grant) when trying to renew a refresh token on our app

Description
Details on your question or the problem you’re trying to solve.

**Error - **
{
“reason”: “Invalid Token!”,
“error”: “invalid_grant”
}

API Endpoint/s?
https://api.zoom.us//oauth/token/ -
full endpoint -
https://api.zoom.us//oauth/token?grant_type=refresh_token&refresh_token=eyJhbGciOiJIUzUxMiIsInYiOiIyLjAiLCJraWQiOiI3ODQxNDc3OC1jOWU5LTQzZDEtODI0ZS1iMTAwYzAxZDgwNjIifQ.eyJ2ZXIiOjcsImF1aWQiOiJkMjI1ZGMzNjc1ZjYwMTgxMTEzYzQxMTM0MWRjZGFjNyIsImNvZGUiOiJpMkhKS2ZiazJ4XzZhemViUmhhVGllVnVtVE51UFh5aUEiLCJpc3MiOiJ6bTpjaWQ6Z0xFT29Wal9Sd0tZQ0ZLOVFjczFRIiwiZ25vIjowLCJ0eXBlIjoxLCJ0aWQiOjU3OCwiYXVkIjoiaHR0cHM6Ly9vYXV0aC56b29tLnVzIiwidWlkIjoiNmF6ZWJSaGFUaWVWdW1UTnVQWHlpQSIsIm5iZiI6MTY1MjAwMTQ1NiwiZXhwIjoyMTI1MDQxNDU2LCJpYXQiOjE2NTIwMDE0NTYsImFpZCI6IlFhVHcxQWZSUjZTS3g1cWNJdDY0S2ciLCJqdGkiOiIzNjgzZmY4MC00ZWVhLTQyNGItODg1My05ODgyZDFiYjNlOGEifQ.HeVqokB8IN0FpZt8R6rbk6obza60mSmr4A1Qs7uti-o9efCa9YdNmYSyibgbOs8Yv8PTxxTXG183mZVCdTnHsQ&client_id=gLEOoVj_RwKYCFK9Qcs1Q&client_secret=4wd4QXmr4sjLve4yVb4iOWgPm47gFxLt

Additional context
we are trying to refresh the refresh token and getting this error , we are saving tokens properly, we are getting this error since last one month

Hi @apps.test,

In this case we usually recommend to reauthorize the app and get a brand new bearer token and refresh token.

It could be that you are trying to use an older refresh token that is no longer valid. It appears that this token was issued on May 8th 2022. Do you have any other more recent tokens?

Let us know!