Thymeleaf error not displayed Spring 4.x

I'm actually following the Spring validation tutorial and I can make it work properly except for one thing.

In fact, tlhe redirections/template return work great if I validate or don't validate the rules.

The thing is that I don't even see the error message in my template. I don't know what's going wrong, I use the same code than the tutorial but it doesn't display anything (the template is well rendered).

Could you help me ?

The controller :

@RequestMapping(value = "/print", method = RequestMethod.POST)
public String printPost(@Valid PrinterEntity printerentity, BindingResult bindingResult, Model model) {
    model.addAttribute("printed", printerentity.getName());
    model.addAttribute("printerentity", new PrinterEntity());

    if (bindingResult.hasErrors()) {
        return "index";
    }

    return "printer/secretarea";
}

The template view (index) :

<form method="post" th:action="@{/print}" th:object="${printerentity}">

    <table>
        <tr>
            <td>
                <input type="text" th:field="*{name}"/>
            </td>
            <td th:if="${#fields.hasErrors('name')}" th:errors="*{name}">
                Name Error
            </td>
        </tr>
        <tr>
            <td>
                <button type="submit">Valider</button>
            </td>
        </tr>
    </table>

</form>