Sage watch with Valet.. "This site can’t provide a secure connection"

I’ve setup a site local with WP CLI Valet Command, and Sage 9.

The site works fine at the local address.

However when I attempt to use the “start” npm command the browser displays an error

This site can’t provide a secure connection. localhost sent an invalid response.


I setup the site as unsecured using the WP CLI Valet command:

wp valet new tailwind --unsecure --project=bedrock

So I am not sure why it is complaining about the SSL protocol…

Any help with this would be much appreciated.