The link seems to go on this page:
Have you made the project public? The message seems to imply you’ve never published the project so I can’t look at its page.
Thanks—you’re correct. The alpha build is intentionally restricted, but I mistakenly used its private page as the public information link. I’m separating the public preview page from the private downloads. If you’re interested in testing, please reply with your OS and general hardware tier and I’ll review you for a private key.