The add-on is raising a runtime error because you are using legacy tools.grayarea56 wrote: ↑Fri Nov 20, 2020 9:05 pm <class 'RuntimeError'>: Path Turn: Legacy Tools Not Supported
Legacy tools are not supported and toolbits are required. I tried to make this clear on github.
If you want to experiment with the add-on and help with the development I highly recommend that you
build the latest version of FreeCAD and include this PR: https://github.com/FreeCAD/FreeCAD/pull/4014
Discussion for that PR is underway here: https://forum.freecadweb.org/viewtopic.php?f=15&t=51824
Thanks,
Dan