Getting started with dash

please i need help , am new in dash have tried to run the first app and am getting this
Traceback (most recent call last):
File “C:\Users\MASELA\Desktop\dash\”, line 31, in
File “C:\Python27\lib\site-packages\dash\”, line 1058, in run_server
File “C:\Python27\lib\site-packages\flask\”, line 938, in run
cli.show_server_banner(self.env, self.debug,, False)
File “C:\Python27\lib\site-packages\flask\”, line 629, in show_server_banner
File “C:\Python27\lib\site-packages\click\”, line 218, in echo
file = _default_text_stdout()
File “C:\Python27\lib\site-packages\”, line 675, in func
rv = wrapper_func()
File “C:\Python27\lib\site-packages\”, line 243, in get_text_stdout
rv = _get_windows_console_stream(sys.stdout, encoding, errors)
File “C:\Python27\lib\site-packages\”, line 295, in _get_windows_console_stream
func = _stream_factories.get(f.fileno())
UnsupportedOperation: fileno

hello amanim, have you found the solution for this problem? because i got similar problem when i tried to run dash for the first time. Thank you