How to change lan address in Emby server

[Robgh 5]

For information, I am usingTrueNAS Scale server

All of a sudden, yesterday,  the emby app on my nVidia Shield would not load up , even though it was working fine an hour before . On investigation, the port number had changed on emby server, and also in emby settings, the lan address has changed. I managed to change the port number ok, but the lan address in the settings is a link, so how do I change it in the settings.

Thanks

Edited 1 hour ago by Robgh