Lightslider - Remove the dark effect it puts on images

Hi guys! I am working on a website by using Grav Snipcart Skeleton. It features lightslider plugin by default on home page. The plugin makes sliding images dark and doesn’t allow image to be visible if it doesn’t have description in page.

Could you please guide me how to deal with this problem. I want pictures to be normal without dark effect and necessary description (headers) in page editor.

Thank you