UnTube/backend/main/templates/intercooler/messages.html

<div class="alert alert-{{ message_type }} alert-dismissible fade show" role="alert">
  {{ message_content }}
  <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
</div>
{% if refresh_page %}
      <meta http-equiv="refresh" content="1" />
{% endif %}