SOLVED: Embedded subtitles don't work on Jellyfin client and Web UI

[TheDreadPirate]

Looks like when JF scanned your media it didn't find any subs. Pick one of these files and re-scan but select "Replace all metadata".

[persuccello23]

Nothing, I also tried with other files but it still doesn't detect subtitles

[persuccello23]

I managed to solve

The issue was in my library configuration because Disable built-in subtitles was set to "None", but it needed to be set to "All".

Sorry and thank you very much.