public function show404page($msg = 'Not Found')
{
$content = str_replace('\\', '/', '<body style="background-image: url(/images/system/natfaund.jpg); background-size: 100% 112%;"></body>');
$response = new Response($content, 404, empty($this->message) ? $msg : $this->message);
$response->sendError();
}
