Firefox Add-on SDK错误

我尝试启动:cfx run但我收到以下错误:

(C:\Users\michal smoczyk\Downloads\addon-sdk-1.14) C:\Users\michal smoczyk\Downloads\addon-sdk-1.14\my-addon>cfx run
Using binary at 'C:\Program Files\Mozilla Firefox\firefox.exe'.
Using profile at 'c:\users\michal~1\appdata\local\temp\tmpkcrwv7.mozrunner'.
Traceback (most recent call last):
  File "C:\Users\michal smoczyk\Downloads\addon-sdk-1.14\bin\cfx", line 33, in 
    cuddlefish.run()
  File "C:\Users\michal smoczyk\Downloads\addon-sdk-1.14\python-lib\cuddlefish\__init__.py", line 928, in run
    bundle_sdk=options.bundle_sdk)
  File "C:\Users\michal smoczyk\Downloads\addon-sdk-1.14\python-lib\cuddlefish\runner.py", line 706, in run_app
    runner.start()
  File "C:\Users\michal smoczyk\Downloads\addon-sdk-1.14\python-lib\mozrunner\__init__.py", line 529, in start
    self.process_handler = run_command(self.command+self.cmdargs, self.env, **self.kp_kwargs)
  File "C:\Users\michal smoczyk\Downloads\addon-sdk-1.14\python-lib\mozrunner\__init__.py", line 59, in run_command
    return killableprocess.Popen(cmd, env=env, **killable_kwargs)
  File "C:\Python27\lib\subprocess.py", line 709, in __init__
    errread, errwrite)
TypeError: _execute_child() takes exactly 17 arguments (18 given)
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "C:\Python27\lib\atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "C:\Users\michal smoczyk\Downloads\addon-sdk-1.14\python-lib\cuddlefish\runner.py", line 534, in maybe_remove_outfile
    os.remove(outfile)
WindowsError: [Error 32] The process cannot access the file because it is being used by another process: 'c:\\users\\michal~1\\appdata\\local\\temp\\harness-stdout-l8remz'
Error in sys.exitfunc:
Traceback (most recent call last):
  File "C:\Python27\lib\atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "C:\Users\michal smoczyk\Downloads\addon-sdk-1.14\python-lib\cuddlefish\runner.py", line 534, in maybe_remove_outfile
    os.remove(outfile)
WindowsError: [Error 32] The process cannot access the file because it is being used by another process: 'c:\\users\\michal~1\\appdata\\local\\temp\\harness-stdout-l8remz'