Cache file contains plain text:
ERROR #404: User not found.
API server answer:

{"data": [{"id": "3740901072", "username": "electricproject_fabrica_gusev", "full_name": "\u0424\u0430\u0431\u0440\u0438\u043a\u0430 \"\u0413\u0443\u0441\u0435\u0432\u044a\"\ud83d\udca1\ud83d\udd0c \u041c\u043e\u0441\u043a\u0432\u0430", "profile_picture": "https://scontent.cdninstagram.com/t51.2885-19/s150x150/19227952_804189749745878_4866517835532206080_a.jpg"}], "meta": {"code": 200}}