"Undefined variable" and "Invalid arguments" errors

I saw one previous bug that was related, #4, which was fixed.

I don't normally use vim/nvim so I hadn't noticed this before, but if I run nvim file.txt or nvim file.md I get the following errors. If I just create a new empty buffer there are no errors.

It's possible this is user error, and if it is please close, but if you have any guidance it would be appreciated.

NVIM: v0.6.0
Commit: HEAD @ 942e02e

Config

let g:pencil#wrapModeDefault = 'soft'   " default is 'hard'

augroup pencil
  autocmd!
  autocmd FileType markdown,mkd call pencil#init()
  autocmd FileType text         call pencil#init()
augroup END

Error:

Error detected while processing function pencil#init:
line   43:
E121: Undefined variable: g:pencil#autoformat
E116: Invalid arguments for function get
E116: Invalid arguments for function pencil#setAutoFormat

[alerque]

Which method did you use to install the plugin?

Vundle