The "default_locale" value is specified in the manifest, but no matching "messages.json" in the "_locales" directory exists. See: https://mzl.la/2hjcaEE
Le valor "default_locale" es specificate in le manifesto, ma nulle "messages.json" concordante existe in le directorio "_localisationes". Vider: https://mzl.la/2hjcaEE