Set-up: MacMini 2012 version running Catalina OS and Roon Bridge connected to network via ethernet cable; USB output from MacMini runs into Berkeley Audio clock (Alpha USB) which in turn connects to Berkeley Audio DAC via AES-EBU digital cable; Nucleus + connected to network via ethernet cable.
This set-up has been running fine (including regularly updating the Roon Server software); last update is build 555; the Settings/About tab in the Roon remote shows that an update is available, but when I ask it to download the latest build update I keep getting an error message that says there was a problem downloading the update. I have rebooted Nucleus+ (several times), reinstalled the Roon OS (multiple times), and also reset the Nucleus and re-entered all the network and storage settings from scratch. Roon works (can play all my music), but I still cannot download the latest update and keep getting the same error message.
Would appreciate suggestions from Roon as to what to try next. For remotes, I use both an iPad mini and two Android handheld devices (same problem on each).