ffmpeg path option grayed out on fedora

[Wazel]

Hello, sorry to dig this up a bit but I have the same issue on Bazzite (based on Fedora Silverblue) and I don't understand your response or where to find this file. There is no jellyfin file or directory in my /etc/default/. I really didn't want to waste anyone's time here as I really appreciate your work but I spent a lot of time googling already, and also I'm a newbie and I'm stuck.

I installed the Jellyfin server through flathub, if that's relevant.