There is no close button for lightbox

Hi,

I used this plugin on my website and here is the url:
http://atousadarabi.ir/backup/tiddev-version02/gallery/nggallery/gallery/%D8%AD%D8%B6%D9%88%D8%B1-%D9%85%D8%AF%DB%8C%D8%B1%D8%B9%D8%A7%D9%85%D9%84-%D9%85%D8%AD%D8%AA%D8%B1%D9%85-%D8%A8%D8%A7%D9%86%DA%A9-%D8%AA%D8%AC%D8%A7%D8%B1%D8%AA

clicking on an image shows it but can’t close it. There is no close button and click on page trigger nothing. I should refresh the page to close the image.
Is there a way to make it in standard form?

Best regards,
Atousa