Are you facing issue of product image not displaying in the Slider or Caraousel in Magento2?

One of the possible reason could be that product image path shows %5C instead of /. To fix this, I have following solutions:-

1. Overrite the vendor\magento\module-page-builder\view\frontend\templates\catalog\product\widget\content\carousel.phtml file in your custom theme.
2. Replace the line

<?= $block->getImage($_item, $image)->toHtml() ?>

with

<img src="<?php echo $_item->getMediaConfig()->getMediaUrl($_item->getImage()) ?>" loading="lazy" width="240px" height="240px" />

Then Clear cache. Refresh the Page, you will see the product images on the Page.

That’s it !!