I get the following errors when trying to execute webshag-gui

root@kali:~# webshag-gui
Traceback (most recent call last):
File "/usr/bin/webshag-gui", line 27, in <module>
gui.run()
File "/usr/share/webshag/webshag/gui/gui.py", line 72, in run
app = WebshagGUI(redirect=False)
File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/_core.py", line 8628, in init
self._BootstrapApp()
File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/_core.py", line 8196, in _BootstrapApp
return core.PyAppBootstrapApp(*args, **kwargs)
File "/usr/share/webshag/webshag/gui/gui.py", line 85, in OnInit
window = WebshagWindow(None, -1, WEBSHAG + ' ' + WEBSHAG_VERSION)
File "/usr/share/webshag/webshag/gui/gui.py", line 161, in init
self.__infoPanel = gui_info.Panel(self.notebook, self)
File "/usr/share/webshag/webshag/gui/gui_info.py", line 103, in init
rootSizer.AddGrowableCol(1)
File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/_core.py", line 15364, in AddGrowableCol
return core.FlexGridSizer_AddGrowableCol(*args, **kwargs)
wx._core.PyAssertionError: C++ assertion "!m_cols || idx < (size_t)m_cols" failed at ../src/common/sizer.cpp(1980) in AddGrowableCol(): invalid column index
root@kali:~#