How can I fix the issue: No module named 'multiselectfield'? - django

Question

I installed django-multiselectfield successfully but it doesn't work. these steps I did to run the lib:
pip3 install django-multiselectfield
INSTALLED_APPS = [
#...,
'multiselectfield'
]
also, I did create requirements.txt file but the error didn't go, How can I install this lib successfully
models.py
from multiselectfield import MultiSelectField
class PlayerName(models.Model):
match = models.ForeignKey(Match, on_delete=models.CASCADE, related_name='player_name')
name = models.CharField(max_length=255)
def __str__(self):
return self.name
PLAYERS = PlayerName.objects.values_list('name', 'name')
class PlayerBox(models.Model):
player_name = models.ForeignKey(PlayerName, on_delete=models.CASCADE, related_name='player_box')
name = MultiSelectField(choices=PLAYERS)
Edit post
Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
File "/usr/lib/python3.8/threading.py", line 932, in _bootstrap_inner
self.run()
File "/usr/lib/python3.8/threading.py", line 870, in run
self._target(*self._args, **self._kwargs)
File "/home/abdelhamedabdin/.local/lib/python3.8/site-packages/django/utils/autoreload.py", line 53, in wrapper
fn(*args, **kwargs)
File "/home/abdelhamedabdin/.local/lib/python3.8/site-packages/django/core/management/commands/runserver.py", line 109, in inner_run
autoreload.raise_last_exception()
File "/home/abdelhamedabdin/.local/lib/python3.8/site-packages/django/utils/autoreload.py", line 76, in raise_last_exception
raise _exception[1]
File "/home/abdelhamedabdin/.local/lib/python3.8/site-packages/django/core/management/__init__.py", line 357, in execute
autoreload.check_errors(django.setup)()
File "/home/abdelhamedabdin/.local/lib/python3.8/site-packages/django/utils/autoreload.py", line 53, in wrapper
fn(*args, **kwargs)
File "/home/abdelhamedabdin/.local/lib/python3.8/site-packages/django/__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/home/abdelhamedabdin/.local/lib/python3.8/site-packages/django/apps/registry.py", line 91, in populate
app_config = AppConfig.create(entry)
File "/home/abdelhamedabdin/.local/lib/python3.8/site-packages/django/apps/config.py", line 90, in create
module = import_module(entry)
File "/usr/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 973, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'multiselectfield'