Django can' t load Module 'debug_toolbar': No module named 'debug_toolbar'

When I try running the project, Django can not load the django-debug-toolbar plugin for some reason. Error message says:

web_1  | ModuleNotFoundError: No module named 'debug_toolbar'

Here is my settings.py

INSTALLED_APPS = [
    # ...
    'django.contrib.staticfiles',
    # ...
    'debug_toolbar',
]

MIDDLEWARE = [
    # ...
    'debug_toolbar.middleware.DebugToolbarMiddleware',
    # ...
]

INTERNAL_IPS = ('127.0.0.1', '192.168.0.1',)

I had to re-install django-debug-toolbar by adding it to requirements.txt and then running:

docker-compose build web

After doing that, the toolbar wasn't still showing. I had to add this code to the settings.py file

def show_toolbar(request):
    return True

DEBUG_TOOLBAR_CONFIG = {
  "SHOW_TOOLBAR_CALLBACK" : show_toolbar,
}

Answered here: https://stackoverflow.com/a/10518040/11011598