Seldom Enable-OrganizationCustomization Issue

Sometimes when you Enable-OrganizationCustomization, it responds with error "

preference variable "ErrorActionPreference" or common parameter is set to Stop: The role assignment policy"Default Role Assignment Policy" wasn't found. Make sure that you typed the identity correctly.

at System.Management.Automation.Runspaces.AsyncResult.EndInvoke()

at System.Management.Automation.PowerShell.EndInvoke(IAsyncResult asyncResult)

at Microsoft.Exchange.Configuration.MonadDataProvider.MonadPipelineProxy.ClosePipeline(MonadAsyncResult asyncResult)"."

anyone know the fix? If I try to rerun the command, it states it's already run.