Admin Site: TemplateDoesNotExist at /admin/

I ran into the same problem, and I had to force pip to re-download django.

pip install -r requirements.txt --ignore-installed --force-reinstall --upgrade --no-cache-dir

Note: I know that the --no-cache-dir option is necessary, I'm not certain that the other options are all required.

I am using Django Version 1.9.7 and when trying to add the admin_tools (menu and dashboard) to my application I had a similar issue. I found I had to do three things:

1. Edit the INSTALLED_APPS option in settings.py as follows (note that the admin_tools come before django contrib, 'mines' is the name of my application):

   INSTALLED_APPS = [
       'admin_tools',
       'admin_tools.theming',
       'admin_tools.menu',
       'admin_tools.dashboard',
       'django.contrib.admin',
       'django.contrib.auth',
       'django.contrib.contenttypes',
       'django.contrib.sessions',
       'django.contrib.messages',
       'django.contrib.staticfiles',
       'mines'
   ]
   

2. Edit the TEMPLATE setting in the settings.py file as follows (note the 'loaders' option that got added, and that APP_DIRS are now set to false):

   TEMPLATES = [{
       'BACKEND': 'django.template.backends.django.DjangoTemplates',
       'DIRS': [],
       'APP_DIRS': False,
       'OPTIONS': {
           'context_processors': [
               'django.template.context_processors.debug',
               'django.template.context_processors.request',
               'django.contrib.auth.context_processors.auth',
               'django.contrib.messages.context_processors.messages',
           ],
           'loaders': [
               'django.template.loaders.filesystem.Loader',
               'django.template.loaders.app_directories.Loader',
               'admin_tools.template_loaders.Loader',
           ],
       },
   }]
   

3. And then finally I updated my urls.py file as follows (note the include for the admin_tools urls):

   from django.conf.urls import include,url
   from django.contrib import admin
   from mines.views import SummaryByMapIcon
   
   urlpatterns = [
       url(r'^admin_tools/', include('admin_tools.urls')),
       url(r'^admin/', admin.site.urls),
       url(r'^summarybymapicon$', SummaryByMapIcon, name='summarybymapicon'),
   ]