SOLVED: I cannot see the content of one library

[Vast]

I have Jellyfin Server installed as a flatpak on TUXEDO OS 4. On the web interface on my PC it’s version 10.10.6 (c335a30), build Release.
I have three Libraries. Two of them work with no problem, but the web interface for the third one is not refreshed with the files that I add in it. I tried deleting and recreating this library, but with no success.
The command “flatpak list” in Terminal shows “Jellyfin Server org.jellyfin.JellyfinServer 10.10.3” even though as I mentioned the web interface shows 10.10.6. So there must be something wrong there. I would be grateful for some advice.

EDIT: To add that the permissions on all three directories where the Libraries are found are the same, 755.

EDIT 2: Probably worth adding that in the web interface I see the three libraries icons, a Next Up section, My Libary 1, My Library 2, but no My Library 3.

[Vast]

I think that I solved the problem of not seeing the videos. I created another folder and placed my videos inside it. Now Jellyfin can see them. I don't understand the reason why this is so. The new folder has the same permissions as the old one.

There remains another question, but I should address it in another section of the Forum.