VR Preview greyed and cannot enable

So i have tried the tutorials on how to enable the VR preview and managed to get all the steps right. However, the “VR Preview” is still greyed out.
I managed to connect the Oculus 2 device on the PC and can see whatever is in the pc. however, when i try for the VR Preview on unreal, it will not allow me to do so. Can anyone help me solve this?

I can edit the UE project using the VR but cannot seem to make the VR Preview work.

Thanks