Login to the Amethyst Web Admin (The same IP you use to listen to calls but you add the port "3080" add the end)
I use https://192.168.1.6 to listen to calls. So I would use https://192.168.1.6:3080 to get to the Webadmin.
Once you are logged in, click on the "Configure Network Settings".
Do not change anything, just click apply settings.
The server will now reboot to try and apply the network settings even though nothing has changed.