Thanks, that's might because Emacs old org-mode version.

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On Thu, Jul 13, 2017 at 8:44 AM, Kaushal Modi <kaushal.modi@gmail.com>
wrote:

> That's a very old incompatible change:
>
> * Version 8.2
>
> ** Incompatible changes
>
> *** =ob-sh.el= renamed to =ob-shell= This may require two changes in user
> config.
>
> 1. In =org-babel-do-load-languages=, change =(sh . t)= to =(shell . t)=.
>
> 2. Edit =local.mk= files to change the value of =BTEST_OB_LANGUAGES= to
> remove "sh" and include "shell".
> http://orgmode.org/cgit.cgi/org-mode.git/plain/etc/ORG-NEWS
>
>
> On Wed, Jul 12, 2017, 8:26 PM numbchild@gmail.com <numbchild@gmail.com>
> wrote:
>
>> RT
>> I checked `ORG-NEWS` and git log history. Have not found this change in
>> recent commits.
>> Can someone explain this?
>>
> --
>
> Kaushal Modi
>