SketchUp Viewer VR with Rift S - models locked

Decided to have a crack at the SU (Viewer) VR to compare with what I have been using. However the model is locked I have uploaded - as is the local files folder. Can’t find any reference to this to address. Have purchased the supplementary permissions for the AR app for the tablet (fairly average compared to Kubity) so I suspect there might be a similar requirement here. Any experience with this issue from anyone?