Google+ - 400 - Error fetching OAuth2 access token

The only time we've heard of that error is if the Secret Key for Google is set incorrectly in JFBConnect. Can you double and triple check that you set the proper key from the Google API console into JFBConnect?

The URL you posted for the return to your site is correct. That URL also indicates that your API Key is correct. The only reason you should be getting that error message is if the secret key is incorrect, because that's only used during the return to your site to verify that the user just authenticated.

I hope that helps and that's all it is. If not, and you still can't get things going, just let me know!

Thanks,
Alex

I don't have a good answer for you right now then. That's not an issue we've heard of or can diagnose with the information you've given.

Can you private message me admin credentials for your site? We'll gladly investigate further as to what's going wrong and do what we can to get the Google authentication working.

You can PM me by clicking the message icon under my name to the left.

Thanks,
Alex

Fred,
Very sorry for the delay. I got in originally, but couldn't narrow down the issue. I just had another chance and was able to find the problem. The plugin "System - Multiple Social Login" is somehow interfering with the Google+ login. I'm not sure what the conflict is, but disabling that plugin fixed the problem.

Can you tell me what that plugin does and is it critical to keep it enabled?

Finally, I'd highly recommend going into your Google Application and "Deleting" your current Client ID and setting up a new one. You posted the client and secret key above. I've removed the image already. While it's unlikely any copied those codes and would want to do bad things, having those codes publicly viewable is generally not recommended.

I hope that helps,
Alex

I'm glad we could help narrow things down for you. I hadn't seen that extension before, and it seemed like an obvious conflict. Didn't take long to narrow down, but that's what we do, so no worries that you hadn't found it first

As for being a rip-off, I'd recommend letting others know that by leaving a review in the JED (if they are listed). It's the best way to warn people off of bad extensions... and of course recommend good ones. If you haven't already, please also consider leaving a rating and review for JFBConnect, or our support, on the Joomla Extension Directory. It certainly isn't required, but is very appreciated:
extensions.joomla.org/extensions/social-...ook-integration/7215

Thanks, and best of luck,
Alex