How to link (a menu item) to the RSS feed? In our Drupal installation there is a menu item for the RSS feed, pointing to path de/rss for the German feed.

This path appears unchanged in the frontend and is invalid, hence results in a 404.

The correct URL is /de/rss.xml or just /rss.xml.

Weird thing is, that Drupal accepts the non-working path, while it rejects the correct ones: 


  The path 'de/rss.xml' is either invalid or you do not have access to it.


What's going on?

Note: I'm using the i18n module. And when I call /de/rss.xml it gets redirected to /rss.xml.
If you're using i18n module, and after you have installed module Variable, you should enable the i18n_variable module (one of the i18n submodules that requires the Variable module, among others).

Then navigate to /admin/config/regional/i18n/variable (= the Variables tab within '
Multilingual settings'). There you'll be able to specify all sorts of variables for which you want multi language support enabled also, using an appropriate sub-tab there, such as for "Site information", "Menu settings", etc.). Within sub-tab other, there is also "RSS feed for front page" (=The RSS feed for the front page, default is rss.xml). That "other" sub-tab should be between "Menu Settings" (1st sub-tab) and "Site Information" (3rd sub-tab).

I'd be curious to hear if your issue is resolved after you enable that option (by checking the checkbox).