Django project setup using django-configurations

I'm very new to Django and I'm trying to set up a new project, using django-configurations to manage the config of Development, Staging and Production environments.https://pypi.org/project/django-configurations/

I followed the quickstart guide, but after setting things up I keep getting this error when running manage.py runserver:

File "[path_redacted]/django_test/.venv/lib/python3.11/site-packages/django/apps/registry.py", line 165, in get_app_config    raise LookupError(message)LookupError: No installed app with label 'admin'.

This is a brand new blank project, no apps and no changes whatsoever from the default project setup. I only set up django-configurations as per the quickstart guide.

I have manage.py set up as per the guide:

#!/usr/bin/env python"""Django's command-line utility for administrative tasks."""import osimport sysdef main():"""Run administrative tasks."""    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'django_test.settings')    os.environ.setdefault('DJANGO_CONFIGURATION', 'Development')    try:        from configurations.management import execute_from_command_line    except ImportError as exc:        raise ImportError("Couldn't import Django. Are you sure it's installed and ""available on your PYTHONPATH environment variable? Did you ""forget to activate a virtual environment?"        ) from exc    execute_from_command_line(sys.argv)if __name__ == '__main__':    main()

Then do the same with settings.py, by adding the below class just after the default definition of BASE_DIR:

class Development(Configuration):    DEBUG = True

The default installed apps are there and untouched, including the admin app:

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

If I comment out the default admin path in urls.py then manage.py runserver works fine, but then of course I have no access to the admin page.

urlpatterns = [    # path('admin/', admin.site.urls),]

I feel like I'm missing something very obvious here, but I just can't figure out what.