403 Forbidden

Why i am getting 403 Forbidden error on a post of my website. Also “The website’s configuration prevents you from accessing this page.” This error is also coming on same post.
Link http://www.flipytech.com/whatsapp-new-feature-pin-important-chats/

Other posts are running well

Using our hosting to share articles about how to steal user details and hack things are not tolerated at all, so malicious URLs are automatically blocked and return a 403 Forbidden error.