We're going to need to know as a minimum:
- Linux distribution and version
- Jellyfin install method and version
- what you have already tried- not sure where all those flags are coming from
I would also support the comments here recommending that you use docker. There's only a small number of Linux distributions and versions where a distribution package installation of jellyfin is fully supported, but even then what you need to do varies across each one. All Linux distributions and versions support docker and the process is essentially the same for all of them.
I think you're missing a key area here. The original Mozilla product was Netscape- a commercial combined web browser and email client. There used to be a number of commercial competitors in the space, e.g. Opera, Eudora, etc. Microsoft killed that market in the 1990's.
I struggle to see how any organisation could make money out of giving away a product that costs money to produce and promote. You've suggested they could have been Proton but that's a completely different sector. We could just as easily have suggested they could have been Twitter, WhatsApp or Instagram.