I have followed the tutorial on Instagram Display API, created my redirect_uri on ngrok and correctly assign my app_id. Here is the response I get.
{
"error_type": "OAuthException",
"code": 400,
"error_message": "Insufficient developer role"
}
What should I do? I am an Administrator so I can't assign myself as a Developer.
Go to Roles > Instagram Users and add your Instagram account. Then go to https://www.instagram.com/accounts/manage_access/ to accept the Tester Invite from your app.