The image urls you placed seem to be missing.

But do you have this online, so I can see what is going on?

It seems you are trying to open a page that uses its own modal script inside a modal.

The bagallery scripts don't seem to be getting loaded on the 'modal' subtemplate.
See: craftsmecca.lt/en/fabrics.html?tmpl=modal

This could probably get solved. But even then, you will have 2 modal scripts running which will likely clash with each other.

Furthermore, it is pretty user-unfriendly to have modals inside modals. So I would advise against that.