title: Cannot start dev server
body: <p>With this command</p>
  
  <pre><code>dev_appserver.py .
  </code></pre>
  
  <p>I'm trying to deploy to local server however it is giving me an error:</p>
  
  <pre><code>INFO     2015-12-18 17:09:57,667 api_server.py:205] Starting API server at: http://localhost:51776
  INFO     2015-12-18 17:09:57,678 dispatcher.py:197] Starting module "default" running at: http://localhost:8080
  INFO     2015-12-18 17:09:57,681 admin_server.py:116] Starting admin server at: http://localhost:8000
  Traceback (most recent call last):
    File "C:\Program Files\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\_python_runtime.py", line 83, in &lt;module&gt;
      _run_file(__file__, globals())
    File "C:\Program Files\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\_python_runtime.py", line 79, in _run_file
      execfile(_PATHS.script_file(script_name), globals_)
    File "C:\Program Files\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\google\appengine\tools\devappserver2\python\runtime.py", line 175, in &lt;module&gt;
      main()
    File "C:\Program Files\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\google\appengine\tools\devappserver2\python\runtime.py", line 155, in main
      sandbox.enable_sandbox(config)
    File "C:\Program Files\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\google\appengine\tools\devappserver2\python\sandbox.py", line 170, in enable_sandbox
      _install_fake_file(config, python_lib_paths, path_override_hook)
    File "C:\Program Files\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\google\appengine\tools\devappserver2\python\sandbox.py", line 252, in _install_fake_file
      stubs.FakeFile.set_skip_files(config.skip_files)
    File "C:\Program Files\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\google\appengine\tools\devappserver2\python\stubs.py", line 178, in set_skip_files
      FakeFile._skip_files = re.compile(skip_files)
    File "C:\python27\lib\re.py", line 190, in compile
      return _compile(pattern, flags)
    File "C:\python27\lib\re.py", line 245, in _compile
      raise error, v # invalid expression
  sre_constants.error: nothing to repeat
  </code></pre>
  
  <p>I have tried to reinstall Google App Engine SDK but still no luck. Any idea on why it doesn't work? It worked before until I listened to it and updated the Cloud SDK.</p>