ERROR: Update failed for the Setup component in Fluid Flow (CFX).
 

I am carrying out a couple FSI simulation by linking ANSYS CFX to Mechanical. However now that I want to edit the setup component of CFX, I recieve the following error when "updating" the component:

"Update failed for the Setup component in Fluid Flow (CFX). Object reference not set to an instance of an object."

System.NullReferenceException: Object reference not set to an instance of an object.
At Ansys.CFX.CFXCore.Data.CFXSetupSource.UpdatePreMes hes(IFullContext context)
at Ansys.CFX.CFXCore.Data.CFXSetupSource.LoadEditorDa ta(IFullContext context, Boolean interactive, Boolean dedicated)
at Ansys.CFX.Foundation.Data.CUESourceDataObject.Edit (IFullContext context, Boolean interactive)
at Ansys.Core.Commands.Concurrency.CommandWorkUnit.ex ecuteInContext(CommandContext subContext, IExecutionEngineCallback tracer)
at Ansys.Core.Commands.Concurrency.BaseWorkUnit.doExe cute(IExecutionEngineCallback executionEngine, CommandContext subContext)
at Ansys.Core.Commands.Concurrency.BaseWorkUnit.Execu te(IExecutionEngineCallback executionEngine, Boolean dontCatchExceptions)
--- Ansys.Core.Commands.CommandFailedException: Object reference not set to an instance of an object.
CommandName: CFX.EditSetup(Container="Setup")
at Ansys.Core.Commands.CommandAsyncResult.Wait(Int32 milliSecondsTimeout, Boolean exitContext)
at Ansys.CFX.CFXCore.Commands.EditSetupCommand.Invoke AndWait(IProtectedContext context, DataContainerReference Container, Boolean Interactive)
at Ansys.CFX.CFXCore.Commands.EditSetupGui.Invoke(Gui OperationContext context)
at Ansys.UI.GuiOperationContext.Invoke(GuiOperationMe taData operationData)
at Ansys.UI.UIManager.InvokeOperationCore(String pseudoname, OperationDelegate callback, Boolean allowOSMessages, Boolean coreTransaction).

Any suggestions as to how to resolve the issue would be welcome.
Thanks