Conflict between lightbox Photo Gallery & lightbox theme

Hello,

I’m currently testing the installation of a photo gallery on my website.
I created an album: no problem.

Today I created a simple gallery, and there is a conflict between my theme “sahifa” and plugin. 2 Lightbox open at the same time.

https://www.zoomsurlille.fr/galerie-photos/autres

How to prioritize “photo gallery” lightbox and not the theme?

Thanks

https://www.ads-software.com/plugins/photo-gallery/