AddThis Plugin Shows Cross Domain Error

I am using addthis wordpress plugin for social networking on a website. Strange, but it shows an error in the following image,

I was looking for this type of error they say, since the link in the iframe is different from the link to the site, you cannot share data between different urls.

But I didn't do anything like that, I just included the plugin and configured the social buttons on the addthis site.

I am using wordpress 4 and the plugin is addthis for the latest version of Wordpress.

Can someone please tell me how to fix this problem.