app/views/errors/_error.html.erb
<div class="empty-state">
<div class="empty-state-container">
<div class="state-figure">
<%= image_pack_tag "illustrations/error-404.svg", class: "img-fluid", height: 124, alt: "404 Error Illustration" %>
</div>
<h3 class="state-header"> <%= title %> </h3>
<p class="state-description lead text-muted"> <%= message %> </p>
<div class="state-action">
<%= link_to root_path, class: "btn btn-lg btn-light" do %>
<i class="fa fa-angle-right"></i> Go Home
<% end %>
</div>
</div>
</div>