A Token was not found in the SecurityContext.
500 Internal Server Error - AuthenticationCredentialsNotFoundException 

Stack Trace
    in /var/www/apache2php53/ezpublish5/vendor/symfony/symfony/src/Symfony/Component/Security/Http/Firewall/AccessListener.php at line 56  -+
            public function handle(GetResponseEvent $event)
            {
                if (null === $token = $this->context->getToken()) {
                    throw new AuthenticationCredentialsNotFoundException('A Token was not found in the SecurityContext.');
                }
                $request = $event->getRequest();
    at AccessListener ->handle (object(GetResponseEvent))
    in kernel.root_dir/cache/dev/classes.php at line 4047  -+
    at Firewall ->onKernelRequest (object(GetResponseEvent))
    at call_user_func (array(object(Firewall), 'onKernelRequest'), object(GetResponseEvent))
    in /var/www/apache2php53/ezpublish5/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Debug/TraceableEventDispatcher.php at line 447  -+
    at Symfony\Component\HttpKernel\Debug\{closure} (object(GetResponseEvent))
    at call_user_func (object(Closure), object(GetResponseEvent))
    in kernel.root_dir/cache/dev/classes.php at line 3419  -+
    at EventDispatcher ->doDispatch (array(object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure)), 'kernel.request', object(GetResponseEvent))
    in kernel.root_dir/cache/dev/classes.php at line 3352  -+
    at EventDispatcher ->dispatch ('kernel.request', object(GetResponseEvent))
    in kernel.root_dir/cache/dev/classes.php at line 3516  -+
    at ContainerAwareEventDispatcher ->dispatch ('kernel.request', object(GetResponseEvent))
    in /var/www/apache2php53/ezpublish5/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Debug/TraceableEventDispatcher.php at line 135  -+
    at TraceableEventDispatcher ->dispatch ('kernel.request', object(GetResponseEvent))
    in /var/www/apache2php53/ezpublish5/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php at line 110  -+
    at HttpKernel ->handleRaw (object(Request), '1')
    in /var/www/apache2php53/ezpublish5/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php at line 73  -+
    at HttpKernel ->handle (object(Request), '1', true)
    in /var/www/apache2php53/ezpublish5/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/DependencyInjection/ContainerAwareHttpKernel.php at line 57  -+
    at ContainerAwareHttpKernel ->handle (object(Request), '1', true)
    in /var/www/apache2php53/ezpublish5/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php at line 197  -+
    at Kernel ->handle (object(Request))
    in /var/www/apache2php53/ezpublish5/web/index_dev.php at line 14  -+