I had this problem too, but only on one of my machines. In my case it was
triggered by "(require 'ob-R)". Running "byte-compile-file" on ob-R.el
fixed it for me. I don't know what that means, but maybe it will give
someone a clue as to how to track this down.

best,
Ista
On Aug 5, 2015 6:23 PM, "Bastien Guerry" <bzg@gnu.org> wrote:

> Sharon Kimble <boudiccas@skimble.plus.com> writes:
>
> > ╭────
> > │org-babel-safe-header-args , and I think it said something about the
> > | function being void. |
> > ╰────
>
> A similar error is also reported here:
> https://www.reddit.com/r/emacs/comments/3fuq11/org_83_released/
>
> Anyone knows how to reproduce and fix this?
>
> --
>  Bastien
>
>