Affects Version/s: 6.1.20 EE GA2
Reproduced in Branch & Master
Steps to reproduce:
1. Create a new site, "Test" and enable local live staging.
2. Create multiple users and make them site members of "Test."
3. Make sure Test is selected in drop down of Control Panel.
4. Click on Site Memberships.
5. Click "Add Site Roles to" and "Users"
6. Choose Role to add ("Site Owner", for example)
7. On the next screen, click Available to choose users to associate to this role.
There are no users in the Available section.