Deploying Lume to github pages

I'm totaly new to this, but have been following instructions to build a site with lume. It works locally through VSCode on localhost, and now I want to deploy on github pages. I've committed the changes to the repo, and created an action exactly give here: https://lume.land/docs/advanced/deployment/#github-pages but it fails on the deploy action. I'm guessing that I need to customise a parameter, but I can't find any guidance on this. Can anyone advise please?

Error: Creating Pages deployment failed
Error: HttpError: Invalid environment node id

How to deploy a site built with Lume.