Hi. You still didn't change proper permalinks

It's even directly on your site you can find tutorial https://b2b2cplatform.com/?page_id=1089

Hello Sizam, 
I wish to setup this website to a fully functioning multivendor site using ReDokan. I have imported the demo content, but the buttons that has content shows a 404. May I know what are the steps to fully setup the ReDokan theme to a fully functional multivendor site?