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\app.py”, line 31, in
app.run_server(debug=True)
File “C:\Python27\lib\site-packages\dash\dash.py”, line 1058, in run_server
**flask_run_options)
File “C:\Python27\lib\site-packages\flask\app.py”, line 938, in run
cli.show_server_banner(self.env, self.debug, self.name, False)
File “C:\Python27\lib\site-packages\flask\cli.py”, line 629, in show_server_banner
click.echo(message)
File “C:\Python27\lib\site-packages\click\utils.py”, line 218, in echo
file = _default_text_stdout()
File “C:\Python27\lib\site-packages\click_compat.py”, line 675, in func
rv = wrapper_func()
File “C:\Python27\lib\site-packages\click_compat.py”, line 243, in get_text_stdout
rv = _get_windows_console_stream(sys.stdout, encoding, errors)
File “C:\Python27\lib\site-packages\click_winconsole.py”, 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