I have seen the answers to the existing two questions on this topic but it has not helped. And the problem still persists so I am re-posting this question. **Here is my code** $(function(){ SE.init({ clientId: <id>, key: '<key>', channelUrl: 'http://example.com/stack/', complete: function(data) { $('#login-button') .removeAttr('disabled'); }}); $('#login-button').click(function() { SE.authenticate({ success: function(data) { alert( 'User Authorized with account id = ' + data.networkUsers[0].account_id + ', got access token = ' + data.accessToken ); }, error: function(data) { alert('An error occurred:\n' + data.errorName + '\n' + data.errorMessage); }, networkUsers: true }); }); }); Even [the javascript SDK code](https://api.stackexchange.com/docs/js-lib) shows the same problem. The error shows up irrespective of whether I am signed in or not.