Users need to have 'Project Admin' permissions to access the Project Admin panel. This allows them to:
View a full call log for all calls made under the project
The ability to end calls in progress
View all users added to a project
Amend user permissions for the project including adding and removing users
View Pivotboxes under the project and their status (streaming/offline etc)
If you are a Project Admin already, you can give this ability to others under your account by double-clicking on their user role in the User list this will bring up a sector which will allow you to choose from user/admin. Be careful editing your own user role!
If you believe that no one in your project has Admin capabilities please ask an authorised user to call support who will be able to make these changes for you.