XMLHttpRequest can not load when loading a json by GET

var app = angular.module('adminPanel', []);

app.controller('namesController', function($scope, $http) {
     var root = 'http://samp.newclan.com.uy:3000/api';

$http.get(root + "/users")
    .then(function (response) {
    $scope.names = response.data;
    });
});