If you downloaded with embedded libraries, that means the author forgot to properly update his svn-externals. In that case, downloading the addon without embeds likely won't prevent you from having to manually download the library either, since if the author didn't even remember to update externals, it's unlikely he remembered to update his X-Embeds toc field either. :P
You're missing the LibHelper-1.0 addon. Download it, install it, the error should go away (at least that one). Not sure what the point of it is, though... it's about two dozen 1-4 line functions that aren't really related to each other and don't really warrant creating a library for.