Facing problem regarding plotly

Traceback (most recent call last):
File “C:/Users/user/PycharmProjects/pandas_data_visualisation/ploty_cufflinks.py”, line 12, in
df.iplot(’_raj99@plot.ly’)
File “C:\Users\user\PycharmProjects\pandas_data_visualisation\venv\lib\site-packages\cufflinks\plotlytools.py”, line 1216, in _iplot
dimensions=dimensions,display_image=kwargs.get(‘display_image’,True))
File “C:\Users\user\PycharmProjects\pandas_data_visualisation\venv\lib\site-packages\cufflinks\plotlytools.py”, line 1462, in iplot
filename=filename)
File “C:\Users\user\PycharmProjects\pandas_data_visualisation\venv\lib\site-packages\chart_studio\plotly\plotly.py”, line 159, in iplot
url = plot(figure_or_data, **plot_options)
File “C:\Users\user\PycharmProjects\pandas_data_visualisation\venv\lib\site-packages\chart_studio\plotly\plotly.py”, line 225, in plot
figure = plotly.tools.return_figure_from_figure_or_data(figure_or_data, validate)
File “C:\Users\user\PycharmProjects\pandas_data_visualisation\venv\lib\site-packages\plotly\tools.py”, line 1152, in return_figure_from_figure_or_data
"Empty data list found. Make sure that you populated the "
_plotly_utils.exceptions.PlotlyEmptyDataError: Empty data list found. Make sure that you populated the list of data objects you’re sending and try again.
Questions? Visit support.plot.ly

getting this error …
any one who can sole this