I have called the Instagram Meta API for getting the long-lived token. It generates a response like
Sorry, this content isn't available right now
https://graph.instagram.com/access_token?grant_type=ig_exchange_token&client_secret={instagram-app-secret}&access_token={short-lived-access-token}
This is the API which I used for getting the long-lived token.
FYI - I'm using the test app.
I have tried calling the meta API for getting the long-lived token but I couldn't get it.
I faced the same problem recently when I was trying to use the Instagram Graph API. I could exchange a valid short-lived token by a long-lived one using the following endpoint (documentation reference)
curl -i -X GET "https://graph.facebook.com/oauth/access_token?grant_type=fb_exchange_token&client_id=${app_id}&client_secret=${app_secret}&fb_exchange_token=${short_lived_access_token}"
With the corresponding environment variables app_id, app_secret, and short_lived_access_token defined previousuly.
I hope it helps
