Lightbox not working?

Hi all, i may be dumb, but can't get why lightbox isn't showing in a popup, it's basically just a link to the image.
I use the framework button to insert the shortcode which looks like:
[yjsgimgs image="images/image.jpg" class="yjsg-lightbox-items" title="Testimonianze" link="images/imageBIG.jpg" target="" effect="none"]
For what i see from demo and official documentation it should work out of the box?
Am i missing some?

Are you sure your are posting in product assigned forum?: Yes

What is your CMS version?: Joomla 3.x

MySQL Version: 5.x

PHP version: 5.x

Link to installation: Local VM

Have you edited any files? If yes tell us which ones.: No

Is this personal or client website?: Personal

Hello hamlin.
Can you please post your site link so i can see the output.

I would be happy but there's a problem, it's a local virtual machine
Apache doesn't send any error, so i'm a bit confused.....
Any hint?
i've attached the source, not sure it can help btw....

I am not able to see what could be the issue without admin info's or your site link.