"message": "An unknown error has occurred.", "type": "OAuthException", facebook sdk 4 php

Question

This was working perfecty till yesterday. But today got error while request facebook api data. Have been using curl to request the link

https://graph.facebook.com/pageid/?access_token=YOURTOKENHERE. 

I use a valid token with app. This is really weird. How come code suddenly stoped.

{
 "error": {
   "message": "An unknown error has occurred.",
   "type": "OAuthException",
   "code": 1
  }
}

Answer 1

That's probably a bug of the Facebook API, see

• https://developers.facebook.com/bugs/486654544831076/