I'm sorry you're running into issues with Google authentication. There are quite a few changes that Google is going through right now with the discontinuation of Google+. Can you let us know what version of JFBConnect you're using? The latest is v8.0.5, which has the most up to date implementation with their changes.
If that is the version you are using, can you let us know when the Google redirect is failing? Is it when you are redirected to Google to login to your Google account or is it after you authenticate and are brought back to your website?
The part of the link you note is correct. The scope=... part is what tells Google what information we need from the user to authenticate on your site.. mainly, your profile information (name) and email address. It shouldn't cause issues, but if it is, we'll gladly investigate further.
Finally, can you tell us what browser you are using? And if you can try from other browsers to test if the behavior remains, that would help understand the issue further.
Thanks,
Alex