failure.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Something went wrong!</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
</head>
<body>
    <div class="jumbotron jumbotron-fluid">
        <div class="container">
          <h1 class="display-4">OOPs! Something went wrong</h1>
          <p class="lead">Try to SignUp again or contact developer</p>
          <form action="/failure" method="POST">
            <button class="btn btn-warning" type="submit" name="button">Try again</button>
        </form>
        </div>
      </div>
</body>
</html>