So your clients are local? As in on the same LAN? Are your clients using a domain name to connect to your server? Do you have NAT loopback enabled on your router?
Jellyfin 10.10.7 (Docker)
Ubuntu 24.04.2 LTS w/HWE
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
4x WD Red Pro 6TB CMR in RAIDZ1