Need help: unable to search on Facebook

Hello everyone,

I have a problem with Facebook for a few days now.
I can't search in the search bar at the top of the page, whether it's people, places, pages or anything else... Facebook finds nothing except for the pages I've already visited; I always get the message: "no results found for your searches."

I tried on my mobile and it's the same thing.

It's very frustrating because I can't do anything.

Thank you for your help.