Lightbox not working

Hello
The lightbox is not showing, once clicked a new page with an image is shown, not the lightbox.
For example, on this page:
http://www.efratmeiri.co.il/%D7%AA%D7%99%D7%A7-%D7%A2%D7%91%D7%95%D7%93%D7%95%D7%AA/%D7%93%D7%99%D7%A8%D7%AA-%D7%9E%D7%A9%D7%A4%D7%97%D7%AA-%D7%A0%D7%95%D7%98%D7%9E%D7%9F-%D7%97%D7%93%D7%A8%D7%94/

Can you please help?
Thanks
Dan

https://wordpress.org/plugins/simple-lightbox/