Hi Pedro,
On 2024-03-08 18:07, Pedro Andres Aranda Gutierrez <paaguti@gmail.com> writes:

> I’m very interested on how your document header looks like. Can you please send mee a file with your header
> and a couple of dummy slides? I’m not able to reproduce the problem…

The document header was not the problem, as it happened with any
file. The core of the issue is that the org version used to initiate the
export must be the same than the org version run in the asynchronous
export process, as bytecode from org is passed between them (and in my
case this bytecode was mentioning a recently introduced org function
that is not available in the org shipped with emacs). Making sure the
async init file loaded the same org version than the one I use everyday
solved the problem.

Alan