UI: cluster names are empty

As you see the empty-name case in the following UI, it does not break the overall usability. I still able to click the buttons and jump to auth process.

![Screen Shot 2021-12-23 at 13 41 43](https://user-images.githubusercontent.com/16493751/147228945-2df04e68-95c4-460a-98e5-a66b8e541dda.png)
