Analytics360 installation

I’m trying to install Analytics360. I’ve authenticated the Mailchimp process abut the next stage is blocked for some reason – this message comes up from Google…

The page you have requested cannot be displayed. Another site was requesting access to your Google Account, but sent a malformed request. Please contact the site that you were trying to use when you received this message to inform them of the error. A detailed error message follows:

The site “https://deadwhenigothere.org” has not been registered.