facebook login demo got redirect 404 error but login is actually successful already.

I got redirect 404 error when I click the "login facebook" button. But, in fact, login is successful already. So, when I tried to login facebook second time, I can see the second JSON object printed out as above. is this mean a bug from HelloJS or Demo code or Facebook JS SDK?
Without seeing your implementation i wouldn't know what the issue is here.
Hello I try do login with facebook but when I request data of user I have a error in line 2335 r.send(data); and the server show a message not found 404 . please help me.
my code
hello.init({ google : '656984324806-sr0q9vq78tlna4hvhlmcgp2bs2ut8uj8.apps.googleusercontent.com', facebook : '000000000000', windows : '00000000400D8578', twitter: 'eQuyZuECKWPiv3D7E4qdg', instagram: 'e47d210f864c4b1ca94225ddab97205a' }, { // // Define the OAuth2 return URL // This can be anything you like, as long as its the callback associated with the your provider-app client id. // It could even be localhost, e.g. http://localhost/somepath as phonegap is not run from a domain so SameOrigin breaks, instead we take advantage of being able to read the popups URL in PhoneGap redirect_uri : 'https://adodson.com/hello.js/redirect.html' });
hello.on('auth.login', function(auth) {
alert(JSON.stringify(auth));
// Call user information, for the given network hello(auth.network).api('me').then(function(r) { // Inject it into the container alert(JSON.stringify(r)); // var label = document.getElementById('profile_' + auth.network); // if (!label) { // label = document.createElement('div'); // label.id = 'profile_' + auth.network; // document.getElementById('profile').appendChild(label); // } // label.innerHTML = ' Hey ' + r.name; }); });
