It's true that Instagram has changed their API, it means that if you use your Client ID and Access Token, it will not be able to get pictures from other ones.
So, you need to use my keys for the fields, my keys is the old version of their API so it should work as the demo page of ours.
Trang Instagram Dev:
Client ID: dbced689c6da4c3d904fd0ee8d123781
Access Token: 1702244543.dbced68.ee49480cad29402f94887366a2eefea2