We are excited to announce that we have launched our new Hive Community! HiveNation will remain as an archive, but all new posts, discussions, and articles will be created on Hive Community. You can visit our new community at thehivecommunity.aerohive.com
Sorry to hear the problem. This is the first case we heard after NG upgrade. It's likely specific to your deployment. Have you tried a different browser or clearing your browser data and re-try login? If this still doesn't help, would you open a support case via Aerohvie Support Portal?