Getting a 404 page after creating contact.twig

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