it is possible that you may be running a different version of python than the one that came with Inkscape. In my case Inkscape is in the directory D:\Program Files\Inkscape\. When I run the Help menu extension, then I get the DOS window popup that says (very briefly) 'D:\Program Files\Inkscape\python\python.exe'
Could you confirm that the directory it shows in this popup is identical to the directory that Inkscape is installed in?
it is possible that you may be running a different version of python than the one that came with Inkscape. In my case Inkscape is in the directory D:\Program Files\Inkscape\. When I run the Help menu extension, then I get the DOS window popup that says (very briefly) 'D:\Program Files\Inkscape\ python\ python. exe'
Could you confirm that the directory it shows in this popup is identical to the directory that Inkscape is installed in?