[Plugin: Analytics360] Can't authenticate with Google Account

I can connect with MailChimp API just fine, but when I try to authenticate with Google for Analytics, I get an error “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://the-name-of-my-site.com’ has not been registered.’ “

Asked MailChimp for support, they didn’t know, and directed me to https://www.ads-software.com/extend/plugins/analytics360/faq/, which in turn links to a Google Groups discussion back in July 2009 where they talk about this problem, but nothing really gets resolved.

Any help appreciated. Thanks