My fault. The reason seems to be a doom emacs advice.
https://github.com/doomemacs/doomemacs/issues/7222
https://github.com/doomemacs/doomemacs/blob/07fca786154551f90f36535bfb21f8ca4abd5027/modules/lang/org/config.el#L866
On Thu, Jun 22, 2023 at 10:12:50AM +, Ihor Radchenko wrote:
> Eduardo S
Eduardo Suarez writes:
> When loading the following file, I get:
>
> 'File mode specification error: (error Invalid base64 data)'
> ...
> It also happens with 'begin_example'.
May you please provide more detailed steps to reproduce, starting from
emacs -Q? See https://orgmode.org/manual/Feedback
