Redirecting to authentication dialog - “An error occurred. Please try again later”

Question

Why does it always happen to me?

This happens after my application verify for user user login and redirect user to the authentication page:

https://w

Answer 1

I had this error because I was using redirect_url as a parameter instead of redirect_uri.

The Server-Side Authentication doc page says to use redirect_url:

https://www.facebook.com/dialog/oauth?
    client_id=YOUR_APP_ID
   &redirect_url=YOUR_REDIRECT_URI
   &scope=COMMA_SEPARATED_LIST_OF_PERMISSION_NAMES
   &state=SOME_ARBITRARY_BUT_UNIQUE_STRING

But this is incorrect. The OAuth Dialog doc says to use redirect_uri instead, which works, so I'm assuming that you can only use one and not the other:

https://www.facebook.com/dialog/oauth/?
    client_id=YOUR_APP_ID
    &redirect_uri=YOUR_REDIRECT_URL
    &state=YOUR_STATE_VALUE
    &scope=COMMA_SEPARATED_LIST_OF_PERMISSION_NAMES