E117: Unknown function: elm#ShowDocs

[scull7]

Neovim Info

:version
NVIM v0.3.4
Build type: Release
LuaJIT 2.0.5

elm-vim Info

commit 165107a9fd2b20c8f050fc4f977b4e41c790b1e7 (HEAD -> master, origin/master, origin/HEAD)
Merge: 659d6de 5aded93
Author: Josh Waller <mdx.programs@gmail.com>
Date:   Thu Apr 4 23:24:41 2019 -0400

    Merge pull request #120 from pbogut/feature/deoplete-source

    Add deoplete source

Whenever I hit <LocalLeader>d I receive the E117: Unknown function: elm#ShowDocs error.

I've already let g:polyglot_disabled = ['elm'] into my init.vim and ensured that Plug ElmCast/elm-vim is the last enabled plugin.