[O] ox-koma-letter: org-latex--insert-compiler not found

[Jeremie Juste]

Hello,

I'm trying trying org KOMA-Script letter exporter, but I get the
following error: concat:

Symbol's function definition is void: org-latex--insert-compiler.

I could not find the function org-latex--insert-compiler.
Do you have a clue about this?

Best regards,

Jeremie