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 need to see the logs in order to help you.

I personally moved to containers as they are easier to maintain and update

What the fuck is up with all these docker comments?

Check your binaries, might not be the right ones for your platform/ubuntu version

For possibly more information on why the core is dumping (lol) try running jellyfin from the cli (probably just typing the path to the jellyfin executable and pressing enter)

If nothing interesting is printed, try adding strace before the jellyfin executable (Google strace, it intercepts all system calls and logs them) if that doesn’t work tell strace to follow forks.

Other than that you could start using binary debugging tools to see what shared libraries jellyfin is looking for? Maybe run it in gdb…