I got the same error for the deployment of the site with the publisher function (calculated SHA for publisher.js → created publisher.zip → send content in body),
please check Site ID: bece880e-aafc-47b4-8930-69ee34aee63e
I agree this took quite some time, apologies for the back and forth. On a happy note, the work to edit the documentation for this part has already begun. It’s currently just waiting for some more technical details to be confirmed and once it’s done, it’ll be published.
In any case, feel free to reach out in case of more issues.