Why lovelace

why enter ip:8123 and then go to ip:8123/Lovelace,normal situation should be ip:8123/states

Lovelace is experimental for now. You can make HA default to lovelace.

How to make HA default to states or lovelace?

Side Panel. Click i in dev tools at bottom. Click on use lovelace as default for this device in panel on right

thank you! I got it.

You can also open JS console and type localStorage.defaultPage='states' Just pointing this out as you can use different pages as default easily that way.