Wagtail Template Errors

400.html

{% extends "error_base.html" %}
{% load i18n %}
{% block titletag %}{% trans 'Client Error' %}{% endblock %}
{% block body_class %}template-400{% endblock %}
{% block content %}
    % trans "There's been an error. We have problems with customer requests, ie, of your computer, please check it." %}
{% endblock %}
{% block error %}<span>400</span>{% trans 'error'|capfirst %}{% endblock %}

403.html

{% extends "error_base.html" %}
{% load i18n %}
{% block titletag %}{% trans 'forbidden'|capfirst %}{% endblock %}
{% block body_class %}template-403{% endblock %}
{% block content %}
    {% trans "We're sorry, but the requested action is forbidden" %}
{% endblock %}
{% block error %}<span>403</span>{% trans 'error'|capfirst %}{% endblock %}

404.html

{% extends "error_base.html" %}
{% load i18n %}
{% block titletag %}{% trans 'Page not found' %}{% endblock %}
{% block body_class %}template-404{% endblock %}
{% block content %}
    {% trans "We're sorry, but the requested page could not be found." %}
{% endblock %}
{% block error %}<span>404</span>{% trans 'error'|capfirst %}{% endblock %}

500.html

{% extends "error_base.html" %}
{% load i18n %}
{% block titletag %}{% trans 'Server Error' %}{% endblock %}
{% block body_class %}template-500{% endblock %}
{% block content %}
    {% trans "There's been an error. It's been reported to the site administrators via e-mail and should be fixed shortly. Thanks for your patience." %}
{% endblock %}
{% block error %}<span>500</span>{% trans 'error'|capfirst %}{% endblock %}

error_base.html

{% extends "wagtailadmin/admin_base.html" %}
{% load wagtailadmin_tags wagtailcore_tags %}
{% load i18n %}
{% block extra_css %}
{% compress css %}
<link rel="stylesheet" href="{{ STATIC_URL }}wagtailadmin/scss/layouts/home.scss" type="text/x-scss"/>
{% endcompress %}
{% endblock %}
{% block furniture %}
<div class="content-wrapper">
    <div class="content">
        <header class="merged nice-padding">
            <div class="row row-flush">
                {% if user.email %}
                <div class="col9">
                    <h1>{% block titletag %}{% endblock %}</h1>

                    <h2>{% block content %}{% endblock %}</h2>
                </div>
            </div>
        </header>
        {# Always show messages div so it can be appended to by JS #}
        <section class="panel summary nice-padding">
            <ul class="stats">
                <li></li>
                <li><a>{% block error %}{% endblock %}</a></li>
                <li></li>
            </ul>
        </section>
        <div class="panel nice-padding">
            <section>
                <script type="text/javascript">
                  if(window.location.href.toString().indexOf('popup') != -1){
                    document.write('<a href="javascript:window.close()" class="btn btn-info btn-large">{% trans 'Close window' %}</a> ');
                  }else {
                      if (document.referrer != '') {
                          document.write('<a href="javascript:history.back()" class="btn btn-info btn-large">{% trans 'Go back' %}</a> ');
                      }
                      {% if request and user.is_authenticated and user.is_staff %}
                      document.write('<a href="{% url 'admin:index' %}" class="btn btn-large">Go to admin home</a> ');
                      {% endif %}
                  }
                </script>
            </section>
        </div>
    </div>
</div>
{% endblock %}