使用 Symfony 框架的生产服务器上的用户登录失败(身份验证请求无法处理，因为...)

I have followed the guide here (http://symfony.com/doc/current/cookbook/security/entity_provider.html) to setup loading users from database.

我的 security.yml 文件:

security:
encoders:
    SymfonyComponentSecurityCoreUserUser: plaintext
    AcceptmeUserBundleEntityUser: plaintext
role_hierarchy:
    ROLE_SUPER_ADMIN:   [ROLE_ADMIN, ROLE_ALLOWED_TO_SWITCH]

providers:
    in_memory:
        memory:
            users:
                patricia:
                    password: patricia
                    roles: 'ROLE_ADMIN'
    users:
        name: user_provider
        entity: { class: AcceptmeUserBundle:User, property: username }

firewalls:
    user_area:
        pattern: ^/
        anonymous: ~
        provider: user_provider
        form_login:
            login_path: login_route
            check_path: _login_check
            default_target_path: homepage
    dev:
        pattern: ^/(_(profiler|wdt|error)|css|images|js)/
        security: false

    default:
                anonymous: ~
                http_basic: ~

access_control:
        - { path: ^/admin, roles: ROLE_ADMIN }

我的SecurityController.php:

namespace AppBundleController;

use SymfonyComponentHttpFoundationRequest;
use SensioBundleFrameworkExtraBundleConfigurationRoute;
use SymfonyBundleFrameworkBundleControllerController;
use SensioBundleFrameworkExtraBundleConfigurationTemplate;
use SensioBundleFrameworkExtraBundleConfigurationSecurity;
use SymfonyComponentSecurityCoreSecurityContext;

class SecurityController extends Controller
{
/**
 * @Route("/login", name="login_route")
 * @Template("security/login.html.twig")
 */
public function loginAction(Request $request)
{
    if ($request->attributes->has(SecurityContext::AUTHENTICATION_ERROR)) {
        $error = $request->attributes->get(SecurityContext::AUTHENTICATION_ERROR);
    } else {
        $error = $request->getSession()->get(SecurityContext::AUTHENTICATION_ERROR);
    }

    return array(
        'last_username' => $request->getSession()->get(SecurityContext::LAST_USERNAME),
        'error'         => $error,
    );
}

/**
 * @Route("/login_check", name="_login_check")
 */
public function securityCheckAction()
{
    // this controller will not be executed,
    // as the route is handled by the Security system
}
}

我已尝试在 2 个不同的网络主机(FatCow 和 GoDaddy)上上传项目，但问题仍然存在.我在本地使用 PHP 5.4.19(FatCow 使用 5.3.2，GoDaddy 使用 5.4.37).请记住，使用 XAMPP 在 localhost 上工作时一切正常！