VR Preview crosseyed

I’m using the HTC Vive and Unreal Engine 4.19. Whenever I use VR Preview for games/demos I’m building/have built, the images from the right and left lenses of the Vive are overlayed making it seem as if the user is crosseyed. Additionally, the right lens seems slightly zoomed in compared to the left one.

I’ve tried this solution (for 4.18) to no avail: https://answers.unrealengine.com/questions/454339/the-vive-in-vr-preview-keeps-coming-out-looking-cr.html

Does anyone know how to fix this issue? (A step-by-step, if possible, approach would be very much appreciated!)

So I haven’t fixed it per se, however, the crosseyed image does go away when I use version 4.20.