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">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
        integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" 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 or contact the developer</p>
        </div>
    </div>
    <form action="/failure" method="POST">
        <button class="btn btn-lg btn-warning" type="submit">Try Again</button>
    </form>
</body>

</html>