Django static files don't resolve persistent 404 errors

I am new to the current version of Django. I am running 1.11 with python 3. I set up a static file as the docs suggest. Inside installed apps, I have'django.contrib.staticfiles'

Non-commercial / non-commercial / settings.py

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

STATIC_URL = '/static/'
STATICFILES_DIR = (
    os.path.join(BASE_DIR, "static/"),
)

      

        
        
        
      

    

And django seems to work before putting the correct path into the template. Although even if I hardcode the path to the template, the browser still gives 404 not found.

I have a base.html template with some css.

{% load staticfiles %}
<!--Bootstrap-->
<link rel="stylesheet" href="{% static 'css/bootstrap.css' %}">
<link rel="stylesheet" href="/static/css/bootstrap-theme.css">

      

        
        
        
      

    

My directory structure is -

nonprofit
  - goals
  - nonprofit
  - static
    - css
      bootstrap.css
      bootstrap-theme.css
  - templates
      base.html
  db.sqlite3
  manage.py

      

        
        
        
      

    

The browser displays both 404 not found errors and the impossibility of direct access to files.

GET http://127.0.0.1:8000/static/css/bootstrap.css 127.0.0.1/:19 
GET http://127.0.0.1:8000/static/css/bootstrap-theme.css 127.0.0.1/:20

      

        
        
        
      

    

I don't think the problem is with django because it shows the correct path, but even the hard drive cannot be accessed through the browser. I am starting a development server. What's going on with this? Am I misconfigured or missing a configuration? Any help is appreciated. I have looked through all the posts suggested and tried different things without any good results.