User cannot view subsite

So i have gone ahead and joined your site as I saw a plugin that i thought would do the trick - multisite privacy.

I installed it and thought i had set everything up correctly, however…

I created a few test users and a few test sites.

I added test user 1 to my main site and test site1 but when i tried to log in as test user 1 on test site 1 i got this message...This site may only be viewed by users who are subscribed to this site.

Have i done something wrong in the set up? Are their any instructions on how to set up correctly?