Flutter Fluxstore shows blank page on running

Please explain to me the detailed installation guideline for installing Fluxstore Flutter App. Also please tell me whether I need Magento, WooCommerce or OpenCart installed before I can use it. And if so how do I configure my Fluxstore with this.

It depends which copy you bought https://codecanyon.net/search/flutter%20fluxstore

Either way you should consult the author https://help.market.envato.com/hc/en-us/articles/203039054-How-to-contact-an-author