Isn't Scribunto enabled on all wikis by default? The issue, as I see it, is that using raw interwiki transclusion actually just posts the raw wikitext. Meaning that the local resources are used for displaying the template, instead of the resources from templatewiki.
I'm going to close this because I get the feeling it's because the way the template is designed, it's looking for Module:Infoxbox, and when you transclude it, the transclusion of "Module:Infobox" still applies, meaning no matter where you get it from, it will always look for Module:Infobox on the local wiki.
Therefore this isn't a tech ticket but a issue to be resolved on templatewiki.