Add the user that you would be using for creating the Topology type via powershell command , to the Topology Administrators group and reboot the system
Add-TtmCdTopologyType -Id SampleTopologyType -Name StagingOnlyType -EnvironmentPurposes "Staging"Add-TtmCdTopologyType -Id SampleTopologyType -Name StagingOnlyType -EnvironmentPurposes "Staging"