I noticed after the upgrade that the mac address had changed. My DHCP server wasn't handing off the correct address. Also I think the device ID for the cloud service had changed, so that might be where you are experiencing a problem as well. Also can't remember if Nano was on the onion before, but i had to reinstall that as well.
Best posts made by Simon Cain
RE: After Warp Core upgrade, device unreachable