I had the same trouble (but with Fedora, and inkscape 0.48.4). As a hack, I deleted lines 31-33 of eggbot.inx. The problem appears to be the empty _param section.for instructions_setup2. I know nothing about inkscape extensions, but based it off of a fix from someone with a different unrelated extension but same error on newer inkscape. You might want to update the download with a proper fix (or if this fix is correct) so people don’t have to run old versions of inkscape.