Getting Error when starting my Django server

Question

I wrote new models, made migrations, migrated the models but forgot to register the models in the admin.py file. After migrating I started my server and got the following error:

Watching for file changes with StatReloader
Performing system checks...

Exception in thread django-main-thread:
Traceback (most recent call last):
  File "C:\Users\Bilawal Hassan\AppData\Local\Programs\Python\Python38\lib\threading.py", line 932, in _bootstrap_inner
    self.run()
  File "C:\Users\Bilawal Hassan\AppData\Local\Programs\Python\Python38\lib\threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\utils\autoreload.py", line 53, in wrapper
    fn(*args, **kwargs)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\core\management\commands\runserver.py", line 117, in inner_run
    self.check(display_num_errors=True)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\core\management\base.py", line 392, in check
    all_issues = self._run_checks(
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\core\management\base.py", line 382, in _run_checks
    return checks.run_checks(**kwargs)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\core\checks\registry.py", line 72, in run_checks
    new_errors = check(app_configs=app_configs)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\core\checks\urls.py", line 13, in check_url_config
    return check_resolver(resolver)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\core\checks\urls.py", line 23, in check_resolver
    return check_method()
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\urls\resolvers.py", line 407, in check
    for pattern in self.url_patterns:
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\urls\resolvers.py", line 588, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\urls\resolvers.py", line 581, in urlconf_module
    return import_module(self.urlconf_name)
  File "C:\Users\Bilawal Hassan\AppData\Local\Programs\Python\Python38\lib\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 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\ecommerce\ecommerce\urls.py", line 27, in <module>
    path('',include(('foodapp.urls', 'foodapp'), namespace='foodapp')),
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\urls\conf.py", line 34, in include
    urlconf_module = import_module(urlconf_module)
  File "C:\Users\Bilawal Hassan\AppData\Local\Programs\Python\Python38\lib\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 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 779, in exec_module
  File "<frozen importlib._bootstrap_external>", line 916, in get_code
  File "<frozen importlib._bootstrap_external>", line 846, in source_to_code
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
ValueError: source code string cannot contain null bytes
Traceback (most recent call last):
  File "manage.py", line 21, in <module>
    main()
  File "manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\core\management\__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\core\management\base.py", line 328, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\core\management\commands\runserver.py", line 60, in execute
    super().execute(*args, **options)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\core\management\base.py", line 369, in execute
    output = self.handle(*args, **options)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\core\management\commands\runserver.py", line 95, in handle
    self.run(**options)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\core\management\commands\runserver.py", line 102, in run
    autoreload.run_with_reloader(self.inner_run, **options)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\utils\autoreload.py", line 599, in run_with_reloader
    start_django(reloader, main_func, *args, **kwargs)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\utils\autoreload.py", line 584, in start_django
    reloader.run(django_main_thread)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\utils\autoreload.py", line 299, in run
    self.run_loop()
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\utils\autoreload.py", line 305, in run_loop
    next(ticker)
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\utils\autoreload.py", line 345, in tick
    for filepath, mtime in self.snapshot_files():
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\utils\autoreload.py", line 361, in snapshot_files
    for file in self.watched_files():
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\utils\autoreload.py", line 260, in watched_files
    yield from iter_all_python_module_files()
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\utils\autoreload.py", line 105, in iter_all_python_module_files
    return iter_modules_and_files(modules, frozenset(_error_files))
  File "C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\venv\lib\site-packages\django\utils\autoreload.py", line 141, in iter_modules_and_files
    resolved_path = path.resolve(strict=True).absolute()
  File "C:\Users\Bilawal Hassan\AppData\Local\Programs\Python\Python38\lib\pathlib.py", line 1172, in resolve
    s = self._flavour.resolve(self, strict=strict)
  File "C:\Users\Bilawal Hassan\AppData\Local\Programs\Python\Python38\lib\pathlib.py", line 200, in resolve
    return self._ext_to_normal(_getfinalpathname(s))
OSError: [WinError 123] The filename, directory name, or volume label syntax is incorrect: '<frozen importlib._bootstrap>'

After getting this error I deleted my latest migration.py file but still getting the above exceptions while running my server.

Answer 1

Your issue is in the file C:\Users\Bilawal Hassan\PycharmProjects\Ecommerce Website\ecommerce\ecommerce\urls.py in line 27:

path('',include(('foodapp.urls', 'foodapp'), namespace='foodapp')),

Looks like Django can't find the foodapp app, check if the app is installed, you haven't any typo, etc

Answer 2

delete your database,then use command python manage.py showmigrations if migrations are not made then use the migrate commands,otherwise delete both migration file and database file.then create migrations.py and include init.py in it.then run migration commands.it will fix.