It's happening because of what Bitdefender already tells you.
Been documented many times. Bitdefender updated their app to not accept non-https sending. It's not a trivial thing to change, and I have no idea when we'll get to it.
Love the new VR support introduced with 4.7 - good job!
My only gripe are the noticeable cloud billboard "rotation" artifacts when turning my head. They are most noticeable when looking at cloud puffs directly above or below the current viewpoint location. Hopefully that gets fixed.
FYI we do seem to have finally cracked the nut on VR support for SkyMaxx Pro - at least it's working here with our Vive Pro. We're waiting to get a build into beta testers' hands. Stay tuned!