Django: Not Found static/admin/css

You shouldn't change BASE_DIR

In settings.py edit the value of STATIC_ROOT

STATIC_ROOT = os.path.join(BASE_DIR, 'static')

And run collectstatic again

You also need to add the static directory to your urls.py file. Add the following:

from django.conf import settings
from django.conf.urls.static import static

urlpatterns = [
    ...
] + static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)