wagtail_bakerydemo/bakerydemo/templates/404.html

{% extends "base.html" %}

{% block title %}404 - Page not found{% endblock %}

{% block body_class %}template-404{% endblock %}

{% block content %}
    <h1>Page not found</h1>

    <h2>Sorry, this page could not be found.</h2>
{% endblock content %}