Cannot assign Case Roles in Discovery Accelerator

I have recently installed Discovery Accelerator in my existing Evault environment and I am unable to assign Case roles to users in the Accelerator client.

I have the Discovery System Admin role and I can assign application roles to other users but I am unable to assign Case roles. When I view a case in the client there is no Role Assignments tab visble. Only Properties.

I am running Discovery Accelerator version 10.0 SP2 and Accelerator Client 10.0

Any help you can offer is much appreciated.