title: Pycharm gives error "TypeError: 'NoneType' object is not callable" in debug mode for Python-Django Project
body: <p>I have set up the <code>python-django</code> project in Pycharm.</p>
  
  <p>On <code>python manage.py runserver</code> command in run mode, its works fine but when I run the project in debug mode I get following exception:</p>
  
  <pre><code>Traceback (most recent call last):
    File "/home/usmanmaqbool/Downloads/pycharm-community-2018.3/helpers/pydev/pydevd.py", line 2060, in &lt;module&gt;
      main()
    File "/home/usmanmaqbool/Downloads/pycharm-community-2018.3/helpers/pydev/pydevd.py", line 2054, in main
      globals = debugger.run(setup['file'], None, None, is_module)
    File "/home/usmanmaqbool/Downloads/pycharm-community-2018.3/helpers/pydev/pydevd.py", line 1405, in run
      return self._exec(is_module, entry_point_fn, module_name, file, globals, locals)
    File "/home/usmanmaqbool/Downloads/pycharm-community-2018.3/helpers/pydev/pydevd.py", line 1412, in _exec
      pydev_imports.execfile(file, globals, locals)  # execute the script
    File "/home/usmanmaqbool/Desktop/proj/manage.py", line 22, in &lt;module&gt;
      execute_from_command_line(sys.argv)
    File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
      utility.execute()
    File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 359, in execute
      self.fetch_command(subcommand).run_from_argv(self.argv)
    File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/base.py", line 294, in run_from_argv
      self.execute(*args, **cmd_options)
    File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 58, in execute
      super(Command, self).execute(*args, **options)
    File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/base.py", line 345, in execute
      output = self.handle(*args, **options)
    File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 97, in handle
      self.run(**options)
    File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 106, in run
      autoreload.main(self.inner_run, None, options)
    File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/utils/autoreload.py", line 333, in main
      reloader(wrapped_main_func, args, kwargs)
    File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/utils/autoreload.py", line 304, in python_reloader
      exit_code = restart_with_reloader()
    File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/utils/autoreload.py", line 290, in restart_with_reloader
      exit_code = os.spawnve(os.P_WAIT, sys.executable, args, new_environ)
    File "/home/usmanmaqbool/Downloads/pycharm-community-2018.3/helpers/pydev/_pydev_bundle/pydev_monkey.py", line 496, in new_spawnve
      return getattr(os, original_name)(mode, path, args, env)
    File "/home/usmanmaqbool/Envs/proj/lib/python2.7/os.py", line 573, in spawnve
      return _spawnvef(mode, file, args, env, execve)
    File "/home/usmanmaqbool/Envs/proj/lib/python2.7/os.py", line 549, in _spawnvef
      elif WIFSIGNALED(sts):
    File "/home/usmanmaqbool/Envs/proj/lib/python2.7/os.py", line 549, in _spawnvef
      elif WIFSIGNALED(sts):
  TypeError: 'NoneType' object is not callable
  
  Process finished with exit code 1
  </code></pre>
  
  <p>I have also created new Virtua ENV and same issue with new virtual ENV too!</p>
  
  <p><strong>EDIT 1</strong></p>
  
  <p>Database settings:</p>
  
  <pre><code>DATABASES = {
  'default': {
      'ENGINE': 'django.db.backends.postgresql_psycopg2',
      'NAME': 'db_name',
      'USER': 'user',
      'PASSWORD': 'passworf',
      'HOST': 'localhost',
      'PORT': '',
      }
  }
  </code></pre>
  
  <p>A few days ago it was working fine but after the new update version of Pycharm, I am facing this issue on just one project.</p>