I don’t understand his plugin.

Like I said, I don’t understand this plugin and I will be glad if anyone can help me out because I’m a newbie.
When I installed the plugin, did the necessary settings, it was working fine untill I logged out. The logout page was showing 404(Page not found). I thought it should redirect to a particular page on the website instead of showing 404.

And again, I enabled package subscription on my website, and the packages can be found on the product page. The products submitted by vendors are also found on the product page but they are not showing at all on the same products page. Please, how do I fix this issue? I hope someone can assist me in this.