Did you follow all the steps on this page. Looks like you need an initial api call to get a token and then use that token for the call you are trying to make.
It took me a couple of days, but I realised I had a Business App while I needed a Consumer App to deal with the Basic Display API.
It’s my first time using Postman too, and I thought I went through the whole process correctly but I get this error now when trying to authenticate via the Instagram login on Bubble:
I still get this message:
{“error_type”: “OAuthException”, “code”: 400, “error_message”: “Invalid scope: []”}
What I noticed by googling this error is that I miss ‘scope=user_profile,user_media’ in the URL that gets generated after I click on the Instagram button on my Bubble app, as mentioned here:
When I add that string to the URL, then I see this as I should:
So it seems like I have a problem with both a missing string in the URL and the access token (I exchanged the short-lived token with a long-lived one).
About a year ago, Instagram deprecated the Basic Graph API and introduced the Instagram Publishing API. Going forward you’ll need to use that instead of the basic one.