Hi @Hansaem_Lee,
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.
Can you elaborate on the issues you’re seeing? Is it just loading TIDAL albums? Are you able to log in to TIDAL in Roon at all?
have you tried rebooting the Core machine since experiencing this issue?
Thanks!