Valhalla not working

Valhalla not working in Cubase 10 Pro. Hi anyone had this problem? Valhalla Room shows up in PluginsBridgedfor64bitapps on the Insert options. However, does not respond when selected. Have tried deleting obvious 32bit versions. No joy. Any pointers appreciated please. All other plugins seem to be working fine.

Cubase 10 Pro 10.0.5
Mojave 10.14.1