SOLVED: Collections in libraries

[Ptilott]

Hello,

First of all I appologies, english is not my main language so there may be confusion with specific terms, sorry in advance.

I'm actually facing an issue with collections in my libraries. 
To replace the context : I was using Jellyfin server on W11 on my computer with movies. I had for example some Star Wars films that I wanted to see in one collection near other movies alone. (Like in this image for cindrella's collection and Wallace & gromit : https://user-images.githubusercontent.co...f6f7c0.png)
So I tried to enable the option "group movies into collection" in each of my libraries and it was not working, so I used the TMDB Box Set plugin and it worked perfectly.

Then I bought a Synology NAS and installed Jellyfin through a community package by following this youtube video : https://www.youtube.com/watch?v=sK-9tlMDuOE

Then I had to group my collections again, trying at first with the option "group movies into collections", still not working (Is there something I missunderstand with this option ? how is it supposed to work ? Maybe were I doing something wrong in my movies naming or else ?)
So I added again the TMDB box set and this time it was not working. I Tried to restart the server, uninstall and reinstall the plugin, library update, metadata replacement, nothing was working.

So actually I have different libraries : Movies and Collections (The second one created when I added IMDB box set, with all the collections automatically added and movies correctly stored inside, but these collections won't appear in my 'Movies' library)

Am I doing something wrong ? Did I forget to check or uncheck an option ? Is that a bug ?

I would really appreciate if someone could help me with that.

P.

[theguymadmax]

Dashboard->Libraries->Display->Group movies into collections (make sure that is selected)

[Ptilott]

You are insane, thank you so much, I feel so stupide now that I see how Easy to fix it was...