Your new site is submitting data to Google’s secure server. Google checks to ensure your site is registered and has been validated.
Because your site fails Google’s validation checks it does not process the received data and directs you to a welcome page.
It is necessary to register your new site with Google.
This problem seems similar to Google Analytics. Without verification I could have numerous sites sending analytical data and hoping to boost a single sites statistics. The verification has to be unique and match the sending site’s url.