I am trying to fetch yahoo contacts of user who visits my site, to invite them, for that i tried to implement the yahoo official PHP SDK to fetch contacts, but when i implemented it and tried to run the example, it says
Sorry! There is an error with the request we received from the website you are trying to use. Please try again in a few minutes. If this error persists please contact the site administrator. Learn more..
I don't understand why it is saying so, when my request is fine as much as i have searched: