tubesync/app/common/templates/errorbox.html

{% if message %}
<div class="row">
  <div class="col s12">
    <div class="card errorbox">
      <div class="card-content">
        <i class="fas fa-exclamation-triangle"></i> {{ message|safe }}
      </div>
    </div>
  </div>
</div>
{% endif %}