Serviio

I have been using Servio for nearly a month without problems. It is installed on a dedicated PC and streams via an Ethernet network to a Samsung TV.
Suddenly from yesterday the PC reboots after 20 or 30 minutes of successful streaming.
I have no idea why this is happening.

Seems unlikely to be related to Serviio. My Serviio streams for hours non-stop with no issues. Windows 11. Reboots as you describe are often a driver issue. Had to say what might be causing the issue. If you're running Windows you might find something in the system log that might give a hint to the cause. If you're using Linux or Mac they have similar logs you can check, but I have no clue how you find them on those OSs.