After a fresh install, twig reports an exception :

An exception has been thrown during the rendering of a template ("Argument '$path' is invalid: Storage directory not found in var/storage/images/getting-started/selected-features/getting-started-with-ez-publish-5/301-1-eng-US/Getting-Started-with-eZ-Publish-5.jpg") in "

{% extends "eZDemoBundle::pagelayout.html.twig" %} {% block content %}
{{ viewResult|raw }} {% endblock %}".
500 Internal Server Error - Twig_Error_Runtime
1 linked Exception: InvalidArgumentException »

[2/2] Twig_Error_Runtime: An exception has been thrown during the rendering of a template ("Argument '$path' is invalid: Storage directory not found in var/storage/images/getting-started/selected-features/getting-started-with-ez-publish-5/301-1-eng-US/Getting-Started-with-eZ-Publish-5.jpg") in "{% extends "eZDemoBundle::pagelayout.html.twig" %}
{% block content %}

{{ viewResult|raw }}

{% endblock %}

".
[1/2] InvalidArgumentException: Argument '$path' is invalid: Storage directory not found in var/storage/images/getting-started/selected-features/getting-started-with-ez-publish-5/301-1-eng-US/Getting-Started-with-eZ-Publish-5.jpg

To prevent the error, I have to comment a line in the DemoController.php, on line 141.

return $this->render(
"eZDemoBundle:footer:latest_content.html.twig",
array(
//bug ez 2013.4 ?
//"latestContent" => $this->getRepository()>getSearchService()>findContent( $query )
"latestContent" => array()
),
$response
);

My list is empty, but the website is useable.