PDF Template for SubWiki

Hello @all,
i using PDF-Template on my main Wiki.
If i export a page to pdf i get this Sceen and there i can select what Template i like to use:

On my subwiki I configure also my Template as in the description here:
https://xwiki.com/en/Blog/createpdftemplate/

But on my subwiki i have no choise to select the Template:
grafik

What I’m doing wrong?

My Xwiki Version: XWiki Debian 12.10.10 on Ubuntu 20.04

Many thank’s for helping
TBC