Oshine portfolios and galleries lightbox won't work


I have been using Oshine theme for a couple of years, but only recently I’ve been redesigning my website and decided to use the Lightbox gallery option both in the portfolios and the gallery. Now, when I click any image on the gallery, or in one of the portfolios, the image opens separately, and not within the lightbox. Is there anyone who experienced the same issue? Happens in Chrome, Safari, and also on mobile and I have no idea how to solve it.

You need to contact the theme author for the free support.