Try the following:
sudo dpkg -P --force-depends python3-cupshelpers system-config-printer-common system-config-printer-gnome system-config-printer-udev system-config-printer
sudo dpkg -i python3-cupshelpers_1.5.9+20170825-0ubuntu1_all.deb system-config-printer-common_1.5.9+20170825-0ubuntu1_all.deb system-config-printer-gnome_1.5.9+20170825-0ubuntu1_all.deb system-config-printer-udev_1.5.9+20170825-0ubuntu1_amd64.deb system-config-printer_1.5.9+20170825-0ubuntu1_all.deb
Please post/attach the output here.
Does the installation now work? Are you able to start system-config-printer? Do the notifications go away?
Try the following:
sudo dpkg -P --force-depends python3-cupshelpers system- config- printer- common system- config- printer- gnome system- config- printer- udev system- config- printer
sudo dpkg -i python3- cupshelpers_ 1.5.9+20170825- 0ubuntu1_ all.deb system- config- printer- common_ 1.5.9+20170825- 0ubuntu1_ all.deb system- config- printer- gnome_1. 5.9+20170825- 0ubuntu1_ all.deb system- config- printer- udev_1. 5.9+20170825- 0ubuntu1_ amd64.deb system- config- printer_ 1.5.9+20170825- 0ubuntu1_ all.deb
Please post/attach the output here.
Does the installation now work? Are you able to start system- config- printer? Do the notifications go away?