Image Gallery Not Working

Hi, I am still waiting for a response to this.

I am trying to add the gallery element to the basic full width page and it doesn’t work properly Instead of the images appearing in front of everything on the page, it appears behind. Please see what I mean in the following link- (Luxe Vacays - About your luxury holiday specialists ). It works fine if you leave it how it is but if you try to add it to any other page layout - especially any page with parallax in it, then it doesn’t work.

I am working in the HTML version of Entrada not the Wordpress.

Can you please tell me how to correct this.

Many thanks.