If using php 8.1, a2s and [odt](https://www.dokuwiki.org/plugin:odt) plugin, it is not possible to export a page with an a2s diagram to odt. I don't know yet if the issue comes from a2s or if this is an odt problem. See this question https://github.com/lpaulsen93/dokuwiki-plugin-odt/issues/274.