app/views/layouts/_errors.html.erb
<% if errors.any? %>
<b-message type="is-danger"
aria-close-label="<%= t('.close_notif') %>"
role="alert">
<h2><%= t('.title', count: errors.count) %></h2>
<ul>
<% errors.full_messages.each do |error| %>
<li><%= error %></li>
<% end %>
</ul>
</b-message>
<% end %>