There are a couple of problems here, for 20.04 LTS.
1) inkscape package declares a Recommends: for python-scour which does not exist in 20.04 - only python3-scour.
2) /usr/share/inkscape/extensions/scour.inkscape.py depends on python2: #! /usr/bin/python2
There are a couple of problems here, for 20.04 LTS.
1) inkscape package declares a Recommends: for python-scour which does not exist in 20.04 - only python3-scour.
2) /usr/share/ inkscape/ extensions/ scour.inkscape. py depends on python2: #! /usr/bin/python2