failure.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link
      rel="stylesheet"
      href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css"
      integrity="sha384-JcKb8q3iqJ61gNV9KGb8thSsNjpSL0n8PARn9HuZOnIxN0hoP+VmmDGMN5t9UJ0Z"
      crossorigin="anonymous"
    />
    <title>Failure</title>
  </head>
  <body>
    <div class="jumbotron jumbotron-fluid">
      <div class="container">
        <h1 class="display-4">Uh oh!</h1>
        <p class="lead">
          There was a problem signing you up! Please try again.
        </p>
        <form action="/failure" method="POST">
          <button type="submit" class="btn btn-lg btn-warning">
            Try Again
          </button>
        </form>
      </div>
    </div>
  </body>
</html>