Navigation in 3rd party gallery

Hello, I am having an issue with enabling navigation for 3rd party gallery plugin. Can I ask for assistance, please?

I have tried several custom selectors without any results:
.vp-portfolio__items-wrap
.vp-portfolio__items vp-portfolio__items-style-default
.vp-portfolio__preloader-wrap

Page with gallery: https://pixelanimal.com/portfolio-2/

Lightbox itself works, but the grouping seems to be an issue. Any idea what more can I do?

Last resort option would be enabling built-in lightbox of the Visual Portfolio plugin (the one used to build the gallery) – AND disable your lightbox for this type of content to avoid two lightboxes opening. Is there some way to do that?

Thanks in advance for any help.

~monoe

The page I need help with: [log in to see the link]