Misago/misago/templates/_misago/form_errors.html

{% load i18n %}
{% if form.is_bound and not form.is_valid %}
<div class="form-errors-block">
  <span class="fa fa-exclamation-triangle"></span>
  <ul class="list-unstyled">
    {% for error in form.non_field_errors %}
    <li>{{ error }}</li>
    {% empty %}
    <li>{% trans "Form has errors." %}</li>
    {% endfor %}
  </ul>
</div>
{% endif %}