Roon Server Software "Not Running"

The Operating System build 227 is also not up to date - though it probably does not matter very much, it may be a symptom of a deeper problem. The current one is 258:

As the OS is out of date and the server not running, and you already tried the Reinstall button which usually fixes everything, not sure what is going on. What happens after you click Reinstall?

I see that you are using a static IP on the Nucleus. I won’t ask why, but ensure that the IP is correct and not used by another device on the network - you router may have assigned it to something else if you didn’t reserve this IP.