django-smart-selects: when i use the demo code, it shows error:Exception Type: NoReverseMatch, details see below

Environment:


Request Method: GET
Request URL: http://127.0.0.1:8000/admin/myapp/location/add/

Django Version: 1.10.2
Python Version: 3.5.2
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'myapp',
 'smart_selects']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']


Template error:
In template D:\Program Files (x86)\anaconda3\lib\site-packages\django\contrib\admin\templates\admin\change_form.html, error at line 33
   Reverse for 'chained_filter' with arguments '()' and keyword arguments '{'foreign_key_model_name': 'Location', 'foreign_key_app_name': 'myapp', 'model': 'Location', 'foreign_key_field_name': 'country', 'field': 'continent', 'app': 'myapp', 'manager': True, 'value': '1'}' not found. 0 pattern(s) tried: []   23 : {% endblock %}
   24 : {% endif %}
   25 : 
   26 : {% block content %}<div id="content-main">
   27 : {% block object-tools %}
   28 : {% if change %}{% if not is_popup %}
   29 :   <ul class="object-tools">
   30 :     {% block object-tools-items %}
   31 :     <li>
   32 :         {% url opts|admin_urlname:'history' original.pk|admin_urlquote as history_url %}
   33 :         <a href=" {% add_preserved_ filters history_url %}" class="historylink">{% trans "History" %}</a>
   34 :     </li>
   35 :     {% if has_absolute_url %}<li><a href="{{ absolute_url }}" class="viewsitelink">{% trans "View on site" %}</a></li>{% endif %}
   36 :     {% endblock %}
   37 :   </ul>
   38 : {% endif %}{% endif %}
   39 : {% endblock %}
   40 : <form {% if has_file_field %}enctype="multipart/form-data" {% endif %}action="{{ form_url }}" method="post" id="{{ opts.model_name }}_form" novalidate>{% csrf_token %}{% block form_top %}{% endblock %}
   41 : <div>
   42 : {% if is_popup %}<input type="hidden" name="{{ is_popup_var }}" value="1" />{% endif %}
   43 : {% if to_field %}<input type="hidden" name="{{ to_field_var }}" value="{{ to_field }}" />{% endif %}



  392.             (lookup_view_s, args, kwargs, len(patterns), patterns)

Exception Type: NoReverseMatch at /admin/myapp/location/add/
Exception Value: Reverse for 'chained_filter' with arguments '()' and keyword arguments '{'foreign_key_model_name': 'Location', 'foreign_key_app_name': 'myapp', 'model': 'Location', 'foreign_key_field_name': 'country', 'field': 'continent', 'app': 'myapp', 'manager': True, 'value': '1'}' not found. 0 pattern(s) tried: []

Edit (by blag): Formatted with fenced code blocks.