I just clicked the Google login button and was properly redirected to the
lobotoradio.com/en/component/jfbconnect/...ogle&return=L2VuLw== page. From there, I could either login with an existing Joomla account, or register a new one.
I'm not sure why you're seeing something different. Can you let me know if you're using a 3rd party SEF extension other than the built-in Joomla SEF URLs? If you are using another extension, set it to 'skip' SEF URLs for JFBConnect and that may fix the issue.
Let me know anything else you can, because like I said, the registration process seems right to me.
Thanks,
Alex