[SOLVED] Can't access subfolders when creating a new library

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Hi guys, new in Jellyfin here. I'm trying to find an alternative to my Plex setup so I just installed Jellyfin to my Synology NAS.

However, when I'm trying to create a new library, say "TV Shows" I'm not able to access the subfolder where media are. All I can select is the main folder on the root of volume, called "Media":



Once I select "Media" the list closes and I see the above image. Clicking again on the three dots I can only select an option in the root of the volume.

"Media" has a lot of subfolders inside, and one is "TV Shows". I don't need to add everything as TV Shows are only inside the same name subfolder.

Is it a bug / a permissions issue / am I doing something wrong?

Thanks.

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EDIT: Well, it was a permissions issue. I had to allow read/write rights to sc-jellyfin and sc-ffmpeg7.