"stdin isn't a terminal" with helm-projectile?

Question

Opening up helm-projectile-find-file keeps showing me this error:

screenshot http://zc.d.pr/16fh0/1Ryb9GGB+

Anyone know how to get rid of this? Or what's causing it?

Emacs config here: https://github.com/neezer/.emacs.d/blob/master/config.org