XmlFileLoader.php第281行中的symfony 2.8 InvalidArgumentException

我让我的申请上线，但我有以下错误：

XmlFileLoader.php第281行中的InvalidArgumentException：

无法分析文件“/////htdocs/vendors/symfony/symfony/src/symfony/Bundle/FrameworkBundle/DependencyInjection/。/Resources/config/web.xml”

我的app_dev.php：

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Debug\Debug;

// If you don't want to setup permissions the proper way, just uncomment the following PHP line
// read http://symfony.com/doc/current/book/installation.html#configuration-and-setup for more information
//umask(0000);

// This check prevents access to debug front controllers that are deployed by accident to production servers.
// Feel free to remove this, extend it, or make something more sophisticated.
if (isset($_SERVER['HTTP_CLIENT_IP'])
//|| isset($_SERVER['HTTP_X_FORWARDED_FOR'])
|| !(in_array(@$_SERVER['REMOTE_ADDR'], array('127.0.0.1', 'fe80::1', '::1', 'my IP')) || php_sapi_name() === 'cli-server')
) {
header('HTTP/1.0 403 Forbidden');
exit('You are not allowed to access this file. Check    '.basename(__FILE__).' for more information.');
}

$loader = require_once __DIR__.'/../app/bootstrap.php.cache';
Debug::enable();

require_once __DIR__.'/../app/AppKernel.php';

$kernel = new AppKernel('dev', true);
$kernel->loadClassCache();
$request = Request::createFromGlobals();
$response = $kernel->handle($request);
$response->send();
$kernel->terminate($request, $response);

---

问题在于PHP的版本需要5.5或更高版本，因为我在一个免费托管的网站上托管我的应用程序

我认为发布你的app_dev.PHP不会有帮助，你能发布Resources/config/web.xml文件吗？