Getting an error that project has not been published yet

I did npx create-plasmic-app , followed the prompts and got this error:
error - Error: Project eE8BNJ2EpynZHuEWnVL8Y7 has not been published yet.
any clues?

because you’re running plasmic loader in preview: false mode, which uses the latest published version. While you’re developing, you can set that to preview: true instead:

For deployment though, you’ll want to use preview:false as that will result in more optimized site

Ah yes, I remember now. thx

Maybe this fix needs to be part of the error message.