What's problem in my code?Could you suggest me?After run Not FoundThe requested URL /contact was not found on this serve

Question

///Main code
<!doctype html>

<html lang="en">
<head>
  {% block head %}
    <meta charset="utf-8">
    <title>{% block title %} Ralph Waldo Emerson {% endblock title %}</title>
    <meta name="description" content="Ralph Waldo Emerson">
    <meta name="author" content="Treehouse">
    <link href='http://fonts.googleapis.com/css?family=Roboto:400,700' rel='stylesheet' type='text/css'>
    <link rel="stylesheet" href="css/master.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
    <script src="js/global.js"></script>
  {% endblock head %}
</head>

<body>
<!--
  <div id="feedback" class="success">
    <h3>Success!</h3>
    <p>You're reading all about Emerson.</p>
  </div>
-->


  <header>
    <h1>Ralph Waldo Emerson</h1>
    <nav>
      <a href="{{baseUrl()}}" class="selected">About</a>
      <a href="{{siteUrl('/contact')}}">Contact</a>
    </nav>
  </header>

  <div class="emerson">
    {% block hero %}<img src="images/emerson.jpg" alt="Picture of Ralph Waldo Emerson">{% endblock hero %}
  </div>

  <main>
    {% block content %}
    {% endblock content %}
  </main>

  <footer>
    {% block footer %}
      <p>A project from <strong><a href="http://teamtreehouse.com">Treehouse</a></strong></p>
      <nav>
        <a href="{{baseUrl()}}" class="selected">About</a>
      <a href="{{siteUrl('/contact')}}">Contact</a>
      </nav>
    {% endblock footer %}
  </footer>

</body>
</html>
//Contact page code


{% extends 'main.twig' %} 
 {% block content %}
    <strong>Contact</strong>
      <h2>Ralph Waldo Emerson</h2>

      <p>Unfortately, Ralph Waldo Emerson has been deceased for over 100 years so he's not particularly expediant at replying to email but you can make an attempt below. However, if you require face to gravestone contact you can visit his remains at:</p>
      <address>
        <h4>Sleepy Hollow Cemetery</h4>
        <p>34 Bedford Street<br>
        Concord, MA 01742, United States<br>
      <a href="https://www.google.com/maps/place/Sleepy+Hollow+Cemetery/@42.464126,-71.343098,15z/data=!4m2!3m1!1s0x0:0x9c41d0f83df689a6?sa=X&ei=ZCgLVZb5Io_hoASc7oHwCQ&ved=0CH0Q_BIwCw">Google Map</a></p>
      </address>

    <form action="" method="post">
      <fieldset>
        <input name="name" type="text" placeholder="Full Name">
        <input name="email" type="email" placeholder="Email Address">
        <textarea name="msg" placeholder="Your message..."></textarea>
      </fieldset>
      <input type="submit" class="button">
    </form>
{% endblock content %}

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Alina Shrestha

Alina Shrestha

What's problem in my code?Could you suggest me?After run Not FoundThe requested URL /contact was not found on this serve