@gaurav @csblack It may be an issue if your nested list (and Instagram endpoint) requires at least 2 users to see any data. To pull nested objects ensure that you have at least 2 users that are authorized Sandbox users and that they’ve “Accepted” being a Sandbox user. By having at least 2 Sandbox users you’ll see the API response you’re expecting.
I had this issue and only the Meta Code was being returned. After adding a second Sandbox user and calling the nested objects again I was able to pull more values in.
In Sandbox mode I’m able to access all the endpoints and scopes.
@Emmanuel helped me to see this by showing me the actual response for a specific endpoint call. I assumed all was working since other nested objects were pulling the correct values. It turns out I needed two Sandbox users to make it work for the particular endpoint I was using.