When I click on the login with G+ I get the consent screen:
"Life Springs Church would like to:
More info
View your basic profile info
Click for more information
By clicking Accept, you allow this app and Google to use your information in accordance with their respective terms of service and privacy policies. You can change this and other Account Permissions at any time."
Then when it returns to the site, I get the error:
"We were unable to retrieve your Google account information. Please try again."
I even created a new app just to see, and I get the same problem.
Please set the "Enable Debug Mode" setting in the JFBConnect Configuration area to "Yes". Then when you try to login, hopefully that will provide more information.
Beyond that, if you're using any SEF extensions, please disable them (temporarily) to see if that helps.
Let us know about the above, and we'll help get you going however we can.
SH404SEF can alter the URLs of JFBConnect in a way that destroys some of the values that each social network is passing back. You'll need to go into the sh404SEF settings and have it 'skip' altering all JFBConnect URLs. That should get you going.
I hope that helps, but if you need anything else, just let us know.