PHP Version 5.5.36

PHP Version 5.5.9

PHP Fatal error:  Class 'lib\Config' not found in /home/*******/public_html/proyecto/app/controller/homeController.php on line 3

<?php
namespace controller;
$config = \lib\Config::getInstance();
$h = new \lib\service\Home();
new \test\Test();
if(isset($_POST['axn'])):
else:
    require_once("app/view/home/home.phtml");
endif;

<?php
$vars = $_REQUEST;
$action = ((!empty($vars['action'])) ? $vars['action'] : "home");
$file = ((is_file("app/controller/" . $action . "Controller.php")) ? "app/controller/" . $action . "Controller.php" : "app/controller/errorController.php");

spl_autoload_register(function($clase){
$DS = DIRECTORY_SEPARATOR; 
$className = explode('\\', $clase);
$class = array_pop($className);
$namespace = implode($DS, $className);

$axn = ((!empty($_GET['action'])) ? $_GET['action'] : "home");

$libPath = 'app' . $DS . strtolower($clase) . '.class.php';
$modelPath ='app' . $DS . $namespace . $DS . $axn . 'Model.php';
$contollerPath = 'app' . $DS . $namespace . $DS . $axn . 'Controller.php';
$sqlPath = 'app' . $DS . $namespace . $DS . $axn . '.class.php';
if(!is_file($libPath) &&
    !is_file($modelPath) &&
    !is_file($contollerPath) &&
    !is_file($sqlPath)):
    $contollerPath = 'app' . $DS . $namespace . $DS . 'errorController.php';
    $modelPath ='app' . $DS . $namespace . $DS . 'errorModel.php';
endif;

if(is_readable($libPath)):
    require_once($libPath);
elseif(is_readable($modelPath)):
    require_once($modelPath);
elseif(is_readable($contollerPath)):
    require_once($contollerPath);
elseif(is_readable($sqlPath)):
    require_once($sqlPath);
endif;
 });
 require_once($file);