_form_errors.html.erb

<% if object.errors.any? %>
  <div id="error_explanation" class="alert alert-danger alert-dismissible animate__animated animate__pulse" role="alert">
    <button type="button" class="close" data-dismiss="alert" aria-label="Close">
      <span aria-hidden="true">&times;</span>
    </button>
    <h4 class="alert-heading">
      <%= t "activerecord.errors.template.header", count: object.errors.count, model: object.model_name.human %>
    </h4>
    <div>
      <p><%= t "activerecord.errors.template.body" %></p>
      <ul>
        <% object.errors.full_messages.each do |message| %>
          <li><%= message %></li>
        <% end %>
      </ul>
    </div>
  </div>
<% end %>