Webchat - Button content does not comes up when type is web_url.

From my webhook (api is written in Java) i am sending below json to display content as button with type as web_url. In my chat window only title comes up, button with title "Google Home Page" does not comes up. Any help or leads will be great!

{
	"replies": [
		{
			"type": "buttons",
			"content": {
				"title": "Please Follow Below KBA's'",
				"buttons": [
					{
						"title": "Google Home Page",
						"type": "web_url",
						"value": "www.google.com"
					}
				]
			}
		}
	],
	"conversation": {
		"language": "en",
		"memory": {
			"user": "Bob"
		}
	}
}