Can't make grav-plugin-feed work

I installed the feed plugin but it doesn’t work on my blog https://www.pixeldetracking.com/fr/

Any idea? I keep getting 404 when trying to access the feed
And for articles, I get a rss but with no content

Any idea?

I got help in Grav Discord room, I didn’t have the right URLs:
https://www.pixeldetracking.com/fr/.rss
https://www.pixeldetracking.com/fr/.atom

It’s OK now