Great fix and it works. You don't need to know anything about coding, just copy and paste. Let me break it down into steps.
1. find this file: button.googleplus.php. Using your Cpanel, navigate to your website files(look out for the file manager tab). Your website host should have a search files feature. If they don't, it's time to find another host. Just copy and paste "button.googleplus.php" into the search box and voila!
2. Open the file. Most host provide a code editor.
3. find this code
$url = 'https://plusone.google.com/_/+1/confirm?hl=en&url='.urlencode($url).'&title='.urlencode($title);
it should be line 28, it's near the bottom. Select the code and paste this code
$url = 'https://plus.google.com/share?url='.urlencode($url);
Save the file and that's it.
You can also pray and pray and hope the plugin author will fix this in the near future.
Hope that helps.