Serviio

When I view the list of devices on thr Status Page of the Console, I do not see the new device I have added. Is there a way to manually add a device ?

What sort of device are you using? I generally see a device added once I've actually used it to access Serviio. Roku devices are like this. They don't appear until I've started Roku Media Player (the app that uses DLNA), which then adds the Roku to the device list. Once it's listed, I can then assign the correct profile, as Serviio doesn't self-assign the correct profile for Roku devices.

The device is a Formuler Z10 SE

Not familiar with that, but it might be similar to what I said about the Roku. Try connecting to Serviio with the player app you regularly use and see if it shows up in the list.