/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, stat
Traceback (most recent call last):
  File "laser.py", line 312, in <module>
    effect.run()
  File "/usr/share/inkscape/extensions/inkex/base.py", line 231, in run
    self.save_raw(self.effect())
  File "laser.py", line 71, in effect
    filename, extension = output_path.split('.')
ValueError: too many values to unpack (expected 2)

Looks like the extension version for 1.0+ is stuck in beta stage.

I'd install Inkscape .92.x and use the stable extension.

https://jtechphotonics.com/?page_id=1980

Not able to download Inkscape .92 it auto updates to Inkscape 1.2.

I'd turn of that auto update and download from here: https://inkscape.org/release/inkscape-0.92.5/