Hello everybody,

I apologize,  I know  that this  topic is org-mode  specific, but  it is
related to emacs.

My problem is exactly the same that is explained here :
[[https://github.com/syl20bnr/spacemacs/issues/9691]]
and my OS  is the same (Gnu Linux  Debian 9).  I do not  succeed to find
the solution,  knowing that I need  to copy and paste  in emacs elements
that are outside emacs.

Your help is welcome. 

-- 
Joseph