Error running your script out of the box

[NicolasMICAUX]

$ whatsapp-chat-analyze messages.txt 
Plotting "message_count"
Traceback (most recent call last):
  File "whatsapp-chat-analyze", line 8, in <module>
    sys.exit(main())
  File "whatsapp_chat_analyze/cli.py", line 389, in main
    plot_count_plots(
  File "whatsapp_chat_analyze/cli.py", line 117, in plot_count_plots
    df["Author"].value_counts().plot(kind="bar")
  File "pandas/plotting/_core.py", line 1030, in __call__
    return plot_backend.plot(data, kind=kind, **kwargs)
  File "pandas/plotting/_matplotlib/__init__.py", line 71, in plot
    plot_obj.generate()
  File "pandas/plotting/_matplotlib/core.py", line 508, in generate
    self._post_plot_logic(ax, self.data)
  File "pandas/plotting/_matplotlib/core.py", line 1972, in _post_plot_logic
    s_edge = self.ax_pos[0] - 0.25 + self.lim_offset
IndexError: index 0 is out of bounds for axis 0 with size 0