Multisite Privacy Users can't access site

Hey guys, need some advice/help to configure the MP plugin on a wordpress intallation. Well first of all i'd like you to know that i didn't purchase Multisite Privacy it was purchased by the person whom im setting up the wordpress multisite for, but i've recently purchased the latest Pro Site using my account for that same individual. This is what's happening , everything seems to be working well as expected but except that when the admin of site "demo.wordpress.dev" add a user , that user is not able to access the site, it says access denied. Ex: when the user "student" after the user login to "demo.wordpress.dev" it says "Access denied" and Here are some snapshot of what's happening. Currently the project is running on localhost using xampp. Any advice/help will be very appreciated thanks guys.
N.B. THE MULTISTE PRIVACY Version 1.1.8.4