Why Instagram Api Return Empty Result?

1) I'm in Sandbox mode 2) App have a Server-side (Explicit) Flow 3) 'Disable implicit OAuth' checkbox active in Manage Clients 4) I have authorized my sandbox user - Instagram API

Solution 1:

Only sandbox authorized users will be returned in API response, if u add a user that follows to sandbox users, then that user will be returned in API response, it is limitation of sandbox mode:

https://www.instagram.com/developer/sandbox/

Data is restricted to sandbox users and the 20 most recent media from each sandbox user