User role on client site is “Subscriber”

Thanks for this great plugin. I installed WP OAuth Server on Server Site and Simple Single Sign-On on Client Site. It works, and I’m able to login to Client Site with Single Sign-On.

The role for the user on Client Site is ‘Subscriber’. On Server Site, I have edited the Client settings: Client Credential Assigned User to a Editor and Administrator. And I had new users created on the Client site at every test. However the user role on the Client site is still ‘Subscriber’.

How can I get the user role to transfer over correctly? Thank you