{{ form_start(form) }}
<div class="row">
    <div class="col-12">
        <div class="group-form">
            {{ form_label(form.name) }}
            {{ form_widget(form.name) }}
            {% if not form.name.vars.valid %}
                <div class="form-error">
                    {{ form_errors(form.name) }}
                </div>
            {% endif %}
        </div>
    </div>
</div>

{{ form_widget(form) }}
<button class="btn btn-add">{{ button_label|default('Valider') }}</button>
{{ form_end(form) }}