Grav-Admin-Plugin/themes/grav/templates/partials/notification-plugins-block.html.twig

{% for entry_id, entry in notifications %}
    <div class="alert {{ entry.type }} position-plugins">
        <a href="#" data-notification-action="hide-notification" data-notification-id="{{ entry.id }}" class="close hide-notification"><i class="fa fa-close"></i></a>
        {{ entry.message|raw }}
    </div>
{% endfor %}