Facebook Graph Explorer Error Code 100 (OAuthException)

So I am inputting my correct access token and the correct ID, and when I use GET, it returns this error.

{
  "error": {
    "message": "(#100) Requires user session", 
    "type": "OAuthException", 
    "code": 100
  }
}

When I use Get Access Token to get a test token, it returns the correct information. Why is this happening?