Go to /etc/jellyfin and delete migrations.xml then "sudo systemctl restart jellyfin". Let me know if it still doesn't start and I will walk you through starting from a clean slate.
Jellyfin 10.10.1 (Docker)
Ubuntu 24.04 LTS
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
3x WD Red Pro 6TB CMR in RAIDZ1 (JF Library)