SOLVED: Jellyfin service not starting

[TheDreadPirate]

I am new to linux and solved the problem with this article.
This is the difference between the two .service files I searched on gemini.
It is puzzling that this erroneous content is on Jellyfin's main documentation page. 

Mine had an error when installing on Linux Mint 21

It happened after I uninstalled flatpak and reinstalled it via CLI
Does anyone have the same problem as me? Why doesn't it run when following the instructions in the official jellyfin documentation?

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The documentation you screenshoted is for a "manual" Linux install for distros that we do not have packages for.  If you are running linux mint, the jellyfin service file is automatically created and configured correctly after you install from our repo with apt.