Unable to connect localhost

Please advise.

Hello James,

Based on the screenshot, I suppose you are working with a HA trial setup.
However, only one connection is shown in the Connection menu. By default, the trial already has three connected brokers. This leads me to believe that the license is not loaded. The Management Center only allows one connection if a license is not found.

Can you check the license step from our onboarding guide and make sure you follow the steps there?