I presume you are currently having some server issues. I was trying to run through your tutorial on making a list app. Every time I would publish a preview it would take close to a minute for anything to show up on the page. Also, I clicked on the delete workspaces button and now I cannot access any projects nor can I create any new projects. I get this error... "Error setting up the project: Internal server error
Yep, we're seeing a number of failures accessing projects at the moment, and we're looking into it.
Part of the fun of a beta!
The server issues were resolved last night, and there shouldn't be any further problems starting projects.