Okay thank you. Will try to contact there.
Problem is not with the plugin. That is working fine on both of my sites. I mentioned the plugin name just to inform that I listed the products using that plugin. But on my site problem is with the permalinks which is WordPress thing.
One more thing:
thestylearena.com/product/classic-womens-winter-boots/ this product is accessible and it is listed in the parent category /shoes. You can see the category permalink below “Add to Cart” button. But when you click on that parent category permalink, it gives 404 page error, although the product is accessible under that category.