ModuleNotFoundError: No module named 'proj' - django

Question

I ran into this problem and searched many resources but couldn't find a solution. My Django project was running successfully on my local. But when I deployed it to the server, it kept getting the following error.
ModuleNotFoundError: No module named 'proj'
I installed all the required libraries and all the settings should be correct as they worked fine on my OSX.
(venv) [root#10-10-7-140 vanilla]# python manage.py runserver
Traceback (most recent call last):
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/core/management/base.py", line 414, in run_from_argv
self.execute(*args, **cmd_options)
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/core/management/commands/runserver.py", line 74, in execute
super().execute(*args, **options)
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/core/management/base.py", line 460, in execute
output = self.handle(*args, **options)
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/core/management/commands/runserver.py", line 81, in handle
if not settings.DEBUG and not settings.ALLOWED_HOSTS:
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/conf/__init__.py", line 87, in __getattr__
self._setup(name)
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/conf/__init__.py", line 74, in _setup
self._wrapped = Settings(settings_module)
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/conf/__init__.py", line 183, in __init__
mod = importlib.import_module(self.SETTINGS_MODULE)
File "/usr/local/python3.8/python3.8/lib/python3.8/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 961, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 973, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'proj'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "manage.py", line 22, in <module>
main()
File "manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/core/management/__init__.py", line 446, in execute_from_command_line
utility.execute()
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/core/management/__init__.py", line 440, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/core/management/base.py", line 427, in run_from_argv
connections.close_all()
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/db/utils.py", line 212, in close_all
for alias in self:
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/utils/connection.py", line 73, in __iter__
return iter(self.settings)
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/utils/functional.py", line 49, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/utils/connection.py", line 45, in settings
self._settings = self.configure_settings(self._settings)
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/db/utils.py", line 148, in configure_settings
databases = super().configure_settings(databases)
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/utils/connection.py", line 50, in configure_settings
settings = getattr(django_settings, self.settings_name)
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/conf/__init__.py", line 87, in __getattr__
self._setup(name)
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/conf/__init__.py", line 74, in _setup
self._wrapped = Settings(settings_module)
File "/data/www/vanilla/vanilla/venv/lib/python3.8/site-packages/django/conf/__init__.py", line 183, in __init__
mod = importlib.import_module(self.SETTINGS_MODULE)
File "/usr/local/python3.8/python3.8/lib/python3.8/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 961, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 973, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'proj'
I noticed the message of if not settings.DEBUG and not settings.ALLOWED_HOSTS: and checked my code in venilla/settings.py, which includes:
DEBUG = True
ALLOWED_HOSTS = ['*']
Furthermore, the following line is standard in my manage.py.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'vanilla.settings')
I checked all the libraries are installed correctly, tried to run
python manage.py makemigrations and
python manage.py check. Got the same error.
Really wondering what caused my problem. Can anyone help? Thank you.

Answer 1

After checking the system, I found the following line in /etc/profile.
export DJANGO_SETTINGS_MODULE=proj.settings
It seta the DJANGO_SETTINGS_MODULE to proj.settings and cannot be overwritten by manage.py. After removing it and rebooting the system, the problem is resolved.