Getting error 'link is invalid' once sharing a url with Google+

I am trying to use G+ share link:

<a href="http://ift.tt/2b3jYJE}" onclick="javascript:window.open(this.href,'', 'menubar=no,toolbar=no,resizable=yes,scrollbars=yes,height=600,width=600');return false;"><img src="http://ift.tt/1lCzapA" alt="Share on Google+"/></a>

But once a user click on the link it's giving error, "Link is invalid".

Kindly help!

Thanks :)