SOLVED: Editing network.xml doesn't work

[macnab]

Subnet masks match.
Disabling the firewall made progress. I deleted the old, incorrect server and selected the, now visible, correct server. When I say Open Jellyfin I just get a black screen.
Created port 8096 rules for both directions and for TCP and UDP.
Situation is the same as for firewall disabled.
Going to try reboot. And maybe reinstall.