title: An open FBSession must be specified for calls to this endpoint
body: <p>I'm trying to make a request in <code>Facebook</code> with <code>Corona SDK</code> with the following code: </p>
  
  <pre><code>  local function facebookListener(event)
      if (event.type == "session") then
          if (event.phase == "login") then
              token = event.token
              print("token "..token)
  
            facebook.request( "me/invitable_friend?access_token="..token)
          elseif (event.type == "request") then
            native.showAlert("Facebook listener", "request")
             if ( not event.isError ) then  
                     native.showAlert("req", event.type)
  
           --    -- local response = event.response
               print("response "..event.response )
          else 
              native.showAlert("erro", "erro")
              end
          end
      end
  end
  </code></pre>
  
  <p>The login result returns the token and I make a request....but the request returns the following error in console log: </p>
  
  <blockquote>
    <p> FBSDKLog: Error for request to endpoint 'me/invitable_friend?access_token=ACCESS_TOKEN_REMOVED': An open FBSession must be ##</p>
  </blockquote>