KDE Plasma No output using SPDIF

I’m using an gigabyte brix gb-bxi7-5775 cube computer and KDE plasma. The only issue I’m having is the SPDIF audio port is not working with optical cable. Do I need a driver or additional repository?

First of all, changing the language of the Plasma Desktop does not work (without reboot). I apologize for any incorrect translations of the terms.

Somewhere in the control panel there is an icon of a speaker. In it there is a page called Devices. There the available audio devices are listed.