public/403.html.erb
<!DOCTYPE html>
<html>
<head>
<title>Access forbidden (403)</title>
<%= csrf_meta_tags %>
<%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
<%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>
</head>
<body>
<div class="at-error">
<img class="at-error-image" src="/images/avocado.jpg">
<h1>403 Access forbidden</h1>
<%= link_to 'Go to menus list', menus_path, class:'at-link' %>
</div>
</body>
</html>