'staticfiles' is not a registered tag library: These solutions don't work

Question

I'm new to Heroku and Django.
Now I'm in the middle of Getting Started on Heroku with Python .
When I access https://(...secret...)-app-123.herokuapp.com/db ,
I got the following error:

'staticfiles' is not a registered tag library. Must be one of:
admin_list
admin_modify
admin_urls
cache
i18n
l10n
log
static
tz

Then I found these solutions .
However, these solutions don't solve my problem.

Firstly, I changed

{% load staticfiles %}

to

{% load static %}

... in db.html .

It gave me:

run python manage.py migrate
Running python manage.py migrate on ⬢ (...secret...)-app-123... up, run.3361 (Free)
Operations to perform:
  Apply all migrations: admin, auth, contenttypes, hello, sessions
Running migrations:
  No migrations to apply.
  Your models have changes that are not yet reflected in a migration, and so won't be applied.
  Run 'manage.py makemigrations' to make new migrations, and then re-run 'manage.py migrate' to apply them.

Since the error message tells me to run manage.py makemigrations , I ran:

manage.py makemigrations
Traceback (most recent call last):
  File "C:\Users\xxxxx\python-getting-started\manage.py", line 8, in ?
    from django.core.management import execute_from_command_line
ImportError: No module named django.core.management

No module?
Django is installed on my machine.
I didn't know what to do, so I updated Django on my local machine:

C:\Users\xxxxx\python-getting-started>pip install django --upgrade
Requirement already up-to-date: django in c:\users\xxxxx\appdata\local\packages\pythonsoftwarefoundation.python.3.8_qbz5n2kfra8p0\localcache\local-packages\python38\site-packages (3.1.2)
Requirement already satisfied, skipping upgrade: sqlparse>=0.2.2 in c:\users\xxxxx\appdata\local\packages\pythonsoftwarefoundation.python.3.8_qbz5n2kfra8p0\localcache\local-packages\python38\site-packages (from django) (0.4.1)
Requirement already satisfied, skipping upgrade: pytz in c:\users\xxxxx\appdata\local\packages\pythonsoftwarefoundation.python.3.8_qbz5n2kfra8p0\localcache\local-packages\python38\site-packages (from django) (2020.1)
Requirement already satisfied, skipping upgrade: asgiref~=3.2.10 in c:\users\xxxxx\appdata\local\packages\pythonsoftwarefoundation.python.3.8_qbz5n2kfra8p0\localcache\local-packages\python38\site-packages (from django) (3.2.10)

... But, it doesn't solve my problem.

I also added:

STATIC_URL = '/static/'
STATICFILES_DIRS = [os.path.join(BASE_DIR, 'static')]
VENV_PATH = os.path.dirname(BASE_DIR)
STATIC_ROOT = os.path.join(VENV_PATH, 'static_root')

at the end of settings.py , but it doesn't work, too.

What else can I do?

For your info, there hasn't been any error until now at Getting Started on Heroku with Python .
You can't even reach here, if you have any error.

Please freely ask me about my settings, type this, type that, etc. Thank you in advance.

Answer 1

You should use virtual environment. It will be easier to manage your django project inside virtual environment.