does not open the image correctly

This is a WooCommerce based site. WooCommerce has its own version of Photoswipe. Lightbox with Photoswipe can not be used with WooCommerce product pages.

In addition: you can either disable Lightbox with Photoswipe manually on WooCommerce product pages or use the filter in your theme functions.pphp as described in the FAQ (“How to disable the plugin in certain pages/posts”):

// Disable Lightbox with PhotoSwipe on WooCommerce product pages

function my_lbwps_enabled($enabled, $id)
{
    if (function_exists('is_product')) {
        if (is_product()) return false;
    }

    return $enabled;
}

add_filter('lbwps_enabled', 'my_lbwps_enabled', 10, 2);