This was generated:
https://github.com/PauseAI/paraglide/blob/b50bdd67fdb2050b61cc153759ba9d9471aeed5c/md/nl/local-organizing.md
The English source was:
https://github.com/PauseAI/pauseai-website/blame/9ce5b5fe985c0f583e56933736ebb5584a14207f/src/posts/local-organizing.md#L6
But the localization dropped the <script> block importing the SimpleToc construct, so it fails to render with an error.
(The equivalent DE localization didn't make the same mistake.)
Of course the true fix will ultimately be to the process for localizing and building, currently in PauseAI/pauseai-website/paraglide. Many options for reducing likelihood, better validation, better deploy behavior in presence of a bad localized page, etc.
But putting the issue here as a concrete illustration.