Updating to the latest org-mode (9.2.1) seems to solve this issue.

On Sun, Feb 3, 2019 at 4:40 PM Abdo Haji-Ali <abdo.haji.ali@gmail.com>
wrote:

> I just updated emacs to 27.0.50 and I am seeing the exact same error.
> I think org-preserve-local-variables is in org-macs which is part of
> org-mode source code.
>
> On Sun, Feb 3, 2019 at 4:14 PM Kyle Meyer <kyle@kyleam.com> wrote:
> >
> > Hello,
> >
> > Abdo Haji-Ali <abdo.haji.ali@gmail.com> writes:
> >
> > > On the latest org-mode version, 9.2, I keep receiving the error
> > > 'org-copy-subtree: Invalid function: org-preserve-local-variables'
> > > whenever I try to move a subtree or when I access my agenda.
> > >
> > > This happens even if I run emacs with '-Q'.
> > >
> > > Emacs  : GNU Emacs 25.3.1 (x86_64-redhat-linux-gnu, GTK+ Version
> 3.22.10)
> >
> > This is very likely a problem in your Org installation due to an
> > interaction with the Org version that comes with Emacs 25.  (It lacks
> > the macro org-preserve-local-variables.)
> >
> > See <https://orgmode.org/worg/org-faq.html#mixed-install>.
>
>
>
> --
> Abdo Haji-Ali
>


-- 
Abdo Haji-Ali