Failed to add header in a python file

[kurtontheway]

I was trying to add header in a python file by running the command 'Add Header' in Command Palette, I'm on build 3126 on a centos 7 box, below is the error message:

Traceback (most recent call last):
  File "/home/wangting/apps/sublime_text_3/sublime_plugin.py", line 795, in run_
    return self.run(**args)
  File "/home/wangting/.config/sublime-text-3/Packages/FileHeader/FileHeader.py", line 565, in run
    initial_text, self.on_done, None, None)
  File "/home/wangting/apps/sublime_text_3/sublime.py", line 434, in show_input_panel
    self.window_id, caption, initial_text, on_done, on_change, on_cancel))
TypeError: String required