GCodetools: 'Area' tab fails

Summary:

The Area tab in the GCodetools does not work.

Steps to reproduce:

1. Create a path that is supposed to be the 'center path' of your outlines (the base object, e.g. a star).
2. Create another path that is going to be the outer boundary of the area that you want to fill with the equally spaced outlines of the base object (e.g. a rectangle).
3. Subtract the first from the second.
4. Open the GCodetools Area extension, first tab
5. Select object and apply

What happened?

/usr/lib/python3/dist-packages/apport/report.py:13: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
  import fnmatch, glob, traceback, errno, sys, atexit, locale, imp
Traceback (most recent call last):
  File "gcodetools.py", line 5921, in <module>
    Gcodetools().run()
  File "/opt/inkscape_1.0.x/share/inkscape/extensions/inkex/base.py", line 140, in run
    self.save_raw(self.effect())
  File "gcodetools.py", line 5872, in effect
    self.options.active_tab()
  File "gcodetools.py", line 4164, in tab_area
    elem = area_group.add(PathElement(style=MARKER_STYLE["biarc_style_i"]['area']))
  File "src/lxml/classlookup.pxi", line 77, in lxml.etree.ElementBase.__init__
  File "src/lxml/apihelpers.pxi", line 158, in lxml.etree._initNewElement
  File "src/lxml/apihelpers.pxi", line 297, in lxml.etree._initNodeAttributes
  File "src/lxml/apihelpers.pxi", line 311, in lxml.etree._addAttributeToNode
  File "src/lxml/apihelpers.pxi", line 1437, in lxml.etree._utf8
TypeError: Argument must be bytes or unicode, got 'Style'

What should have happened?

You should now get a set of offset objects around your base object (star), that each have a defined distance from the previous one.

Version Info:

- Inkscape Version: 1.0.1 (16f50bf4c4, 2020-09-08)
- Operating System: Linux Mint 19.3