The menu item for a single category has stopped working.

[fidencereading]

After migrating a bilingual website to Joomla 4 about three months ago, jDownloads was initially working without issues. However, a new problem has recently appeared.

Whenever a user tries to access a jDownloads single category menu item, a 404 error is displayed. This happens in both language versions of the site.

The categories themselves still exist (for example, the Meetings category), and the related menu items are also present (such as Agendas–Minutes). Despite this, the links to those single category pages are no longer functioning and consistently return a 404 error.

[ColinM]

Hi
Could you advise the version of jD and of Joomla you are using please. Also what 2 languages.
Which layout are you using - have you recently changed the layoutyou are using? I ask as some settings require a corresponding place holder in the appropriate layout.
ColinM