Visual Product Configurator for Woocommerce

Plugin link: https://wordpress.org/plugins/visual-products-configurator-for-woocommerce/ Author of the plugin made compatibility with WOOCS, but looks like after latest WooCommerce updates that code not need there:

open file \wp-content\plugins\visual-product-configurator\public.php
find code like: if($WOOCS) and comment there second line of code (see the screen below)

Visual Product Configurator for Woocommerce