I want to help you get this sorted out, but I will need a little more detail about the exact issue you are experiencing.
Our diagnostic tools show that your Roon Server is actually online and successfully playing music today (May 11). Specifically, the system recently recorded flawless Qobuz playback to your FX-D03J+ L2 endpoint.
Since the main server is actively running and processing audio without issue, could you please clarify exactly which device or application you are using when you receive the connection error (for example, are you trying to use Roon ARC away from home, or a specific phone/tablet on your local network)?
Thanks for reaching out. Based on your description, it looks like Windows is blocking access to the Nucleus/ROCK internal storage due to its security settings regarding “Guest” access.
This is a common behavior in recent Windows updates (10/11), where the system automatically blocks network shares that don’t require a password. Since Nucleus is designed to be accessible without a password for convenience, Windows essentially puts up a barrier.
We have a step-by-step guide on how to adjust this setting in Windows so you can copy your music files:
Please give those steps a try and let me know if you are able to connect afterwards!
Just checking in on this. Were you able to try the Windows SMB guest access steps from the article we linked, so you can get into the Nucleus or ROCK internal storage? If Windows is still prompting for a password or blocking the share, let us know what you’re seeing and we can take another look, thanks.