Google+ login through Comments + not logging in

When I click on the Login with Google button I’m sent to my account.google.com and don’t see a way to login to make a comment.

Is it because Comments+ automatically sets my domain as http instead of https. (I had to change it for FB and Twitter for them to work.) I can’t figure out how to do that for Google+ though.

I’m not even sure if that’s the problem. Could you send instructions on how to set this up correctly?