I can’t get Plex to show (ironically) the 2005 film ‘Caché’ aka Hidden. My media library follows the Plex naming convention exactly. But it won’t show up in the library. I’ve tried rescanning library and refreshing metadata.
In the Library (browse) view of your library, apply the “Duplicates” filter to see if it shows anything. It may be that PMS is glomming it onto another existing movie.
Under some circumstances, NAS devices can be intolerant of special characters.
I’d try to avoid the é in the file and folder names.
Use Cache (2005) - {imdb-tt0387898} instead.
Then perform the Plex dance with the file.
Verifying that the file is playing at all (e.g. using VLC) is also a good idea.
Which type of computer are you using to access the NAS?
Is it a Mac?