does nayone know why we are getting this message while trying to login to instagram {"code": 403, "error_type": "OAuthForbiddenException", "error_message": "You are not a sandbox user of this client"}
You are receiving this error because your Instagram app is not available to the public. It can only be used by the owner of the app (or users having been invited using the Sandbox panel of the app).
Then "manage" your app, open the panel "permissions" and "Start a submission". Once Instagram has reviewed the app, it will be public and work for everybody.
The process is unfortunately very complicated, but this is out of our hands.
Answers
It can only be used by the owner of the app (or users having been invited using the Sandbox panel of the app).
Please open your Instagram apps here:
https://www.instagram.com/developer/clients/manage/
Then "manage" your app, open the panel "permissions" and "Start a submission".
Once Instagram has reviewed the app, it will be public and work for everybody.
The process is unfortunately very complicated, but this is out of our hands.