This usually means that another adaptor is being picked up by the test. For me it was the loopback and it doesn't have a speed or mode, so the health test fails. Use ethtool to examine your adaptors and find the one that doesn't have a speed. Add a regex to exclude it in Network Interface Collection Exclusion Regex under the Host configuration screen. My regex for the loopback adaptor (lo) is ^lo$ ... View more