[NSFW] Campaign featured image

I using woodmart theme with WP Crowdfunding.

Single Page Settings
as In WooCommerce Default

problem: in single-page campaign images slider always have second slide black.

see through this link:
https://manavtaa.com/campaign/help-asheesh-sharma-to-fight-with-kidney-failure/

please help me to resolve this.

I made a demo website to test the problem, but the same problem was in it.

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