{# Every error of a refused create form, at the top of the form: also those of fields it keeps behind a picker or hidden. #}
{% if form.errors %}
    <div class="alert alert-danger form-errors" role="alert">
        <ul class="mb-0">
            {% for field in form %}{% for error in field.errors %}<li>{{ field.label }}: {{ error }}</li>{% endfor %}{% endfor %}
            {% for error in form.non_field_errors %}<li>{{ error }}</li>{% endfor %}
        </ul>
    </div>
{% endif %}