No settings currently available in Adsharing

I installed Ad Sharing plugin. In Membership, for Stranger access level and premium access level, I set it as a negative rule and for Contributing Writer's access level I set it as a positive rule.

When I go into the Network Dashboard as well as the site Dashboard, and go to Settings> Advertising, I get this message:

"No settings currently available"

I'd like to be able to make it so that our Contributing Writers can use this plugin. How do I do that? Why is it saying no settings are available and how do I fix that?