E-Prime Extensions for Tobii Pro 3.2 with this HTC VIVE Retrofit (Tobii Eye-tracking VR)

I'm trying to connect E-Prime Extensions for Tobii Pro 3.2 with the HTC VIVE Retrofit (Tobii Eye-tracking VR), but it seems unreachable for the program. However, the HTC is already connected to Tobii Pro Lab.

Does this extension only work for Tobii screen-based eye-tracking?

Has anyone found a way to connect the extension to the HTC Tobii Eye-tracking?