E04048 — EmailTemplateLanguageNotAvailable

This template does not have the language you asked for.

A broadcast sends only an exact match for the language you select, so it fails whenever that language is not on the template's published version, whatever the template's missing-language setting. A message send fails this way only when the template is set to reject a send rather than serve a different language automatically. Select one of the languages the template offers, or add content for the language you need.