How to install Treble beta version?

We wanted to try out RoomBuilder (Space Builder)
Tried using npx create-treble-app@next but it didn’t work.

Hi @ShivWad! Sorry about the confusion. The Space Builder isn’t currently a feature you can test on your own. If you would like to have a Space Builder setup for an implementation, you will need to open a support ticket by emailing [email protected], and they can help you set that up. It is dependent on some template assets existing in your org, and only support can migrate those assets for you.

Understood.

Thanks,
Shivam