Template does not exist django flatpages

Made a cms project in django, but its not loading my default template for flatpages, attached are the images.

Thanks

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.sites',
    'django.contrib.flatpages',
]

SITE_ID = 1

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',
    'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware'
]

Error page

Directory structure

Admin

Did you set the TEMPLATES in your settings.py? Check and set the TEMPLATES.DIR setting to your folder path:

TEMPLATES = {
    'DIRS': [os.path.join(BASE_DIR, 'templates')],
}

Moreover, you can move the templates folder inside the cms folder. In this case, be sure that TEMPLATES.APP_DIRS is set to True.

cms
+- cms/
 +- templates/
  +- flatpages/
   +- default.html
 +- views.py
 +- other django stuff...
+- db.sqlite3

You can find more information in the official documentation: https://docs.djangoproject.com/en/2.1/topics/templates/#configuration