export pkg=pkgname
rm $pkg.comic
zip -rx\*~ -x\*.swp $pkg.comic $pkg
cp -va $pkg.comic ~/.local/share/plasma/comics/
pushd ~/.local/share/plasma/comics/
unzip $pkg.comic
popd
plasmoidviewer -a org.kde.plasma.comic
If things doesn't behave, remove cached files first:
rm -v ~/.local/share/plasma_engine_comic/$pkg*
The errors from the comic plasmoid are quite sparse, but an error like xkcd:404 expresses a problem with xkcd comic strip #404.