Hi @Arnold_Spieker,
So we can better assist you, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
Often times a reboot will resolve this type of issue, but since that didn’t seem to help here, please try the following:
- Stop RoonServer on the Core machine
- Find and open your Roon database
- Navigate to
Roon/Cache - Move the contents of the
/Cachefolder elsewhere, like your desktop - Try restarting Roon and verify if the issue still occurs