Theme Preview is broken

[jimbeam4]

Hello,

I've tried  @Shopify/cli `3.69.4` and `3.70.0`. I've generated a new project and a theme extension with a single Liquid block.

Liquid block is a standard 5star rating template that is automatically generated from the CLI.

The theme preview has (a) broken styles and (b) does not even seem to embed my liquid block on the page.

I've attached the screenshot of the page. Has anyone encountered anything similar?