django 报错TypeError: __init__() missing 1 required positional argument: 'app_module'

错误提示如下

System check identified no issues (0 silenced).
September 30, 2020 - 01:37:31
Django version 3.1.1, using settings 'scpy.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
Exception in thread django-main-thread:
Traceback (most recent call last):
  File "C:\Users\yijia\AppData\Local\Programs\Python\Python38\lib\threading.py", line 932, in _bootstrap_inner
    self.run()
  File "C:\Users\yijia\AppData\Local\Programs\Python\Python38\lib\threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "D:\pythonProject\scpy\venv\lib\site-packages\django\utils\autoreload.py", line 53, in wrapper
    fn(*args, **kwargs)
  File "D:\pythonProject\scpy\venv\lib\site-packages\django\core\management\commands\runserver.py", line 138, in inner_run
    handler = self.get_handler(*args, **options)
  File "D:\pythonProject\scpy\venv\lib\site-packages\django\contrib\staticfiles\management\commands\runserver.py", line 27, in get_handler
    handler = super().get_handler(*args, **options)
  File "D:\pythonProject\scpy\venv\lib\site-packages\django\core\management\commands\runserver.py", line 65, in get_handler
    return get_internal_wsgi_application()
  File "D:\pythonProject\scpy\venv\lib\site-packages\django\core\servers\basehttp.py", line 45, in get_internal_wsgi_application
    return import_string(app_path)
  File "D:\pythonProject\scpy\venv\lib\site-packages\django\utils\module_loading.py", line 17, in import_string
    module = import_module(module_path)
  File "C:\Users\yijia\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 "D:\pythonProject\scpy\scpy\wsgi.py", line 16, in <module>
    application = get_wsgi_application()
  File "D:\pythonProject\scpy\venv\lib\site-packages\django\core\wsgi.py", line 13, in get_wsgi_application
    return WSGIHandler()
  File "D:\pythonProject\scpy\venv\lib\site-packages\django\core\handlers\wsgi.py", line 127, in __init__
    self.load_middleware()
  File "D:\pythonProject\scpy\venv\lib\site-packages\django\core\handlers\base.py", line 58, in load_middleware
    mw_instance = middleware(handler)
TypeError: __init__() missing 1 required positional argument: 'app_module'

Process finished with exit code -1

解决方案

setting.py中的MIDDLEWARE误填入了app名，把误填的app放到INSTALLED_APPS中即可