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.