Kindly install the latest null version of Active ecommerce v6.3.1 and then add this addon
Purchase today! & use Active eCommerce Wholesale (B-B) Add-on download gpl for your eCommerce business which is only developed with the most efficient eCommerce CMS named Active eCommerce CMS. This addon provides wholesale functionality for ecommerce CMS where admin can create wholesale products and set prices according to quantity. Customers can purchase wholesale products in bulk quantities.