Thanks for jumping in - my network configuration is very simple.
There’s a standard router (CBN, provided by my provider Vodafone), NAS is connected via LAN, DHCP on, Roon remote access via WLAN (Macbook & LG mobile on Android). Most basic configuration I can think of
Not only my MacBook isn’t able to access Roon - tried it with my Android, same story. And it already worked quite well - Roon was visible and busy collecting Albums and is running for about 4 days now. I didn’t touch anything, suddenly there was only the White Screen with Logo … really strange.
Is there anything else you need in order to understand what’s going on?