{% if form.non_field_errors %}
    <div id="error1" class="alert alert-error">
    {% if form_error_title %}
        <span class="ba-heading">{{ form_error_title }}</span>
        {% endif %}
        <ul aria-live="polite" aria-relevant="additions removals">
            {{ form.non_field_errors|unordered_list }}
        </ul>
    </div>
{% endif %} 

{% comment %}
{% if form.non_field_errors %}
    <div class="alert alert-block alert-danger">
        {% if form_error_title %}<h4 class="alert-heading">{{ form_error_title }}</h4>{% endif %}
        <ul class="m-0">
            {{ form.non_field_errors|unordered_list }}
        </ul>
    </div>
{% endif %}
{% endcomment %}