Hei,
I encounter the same issue (transparent black (or other color) boxes in a bar on the lower and on the right screen border), when using the DX11 API. As Vulkan API is rather slow, and I have a rather old graphics card (GTX 770 - I know, it is below the min specs, but with a bit of optimization - see below -, it works pretty well), using Vulkan is not an option. I have read in a different forum that updating Nvidia does the trick ... but unfortunately Nvidia ended the Kepler architecture support in September/October - so the newest Nvidia driver fixing this issue will not work for me.
But I discovered a fair work around: Using "AMD FSR 1.0: Ultra Quality" in the video settings reduces this annoying bars to just a thin line on the right side. And, actually, graphics quality is pretty good

with this setting.
Before finding this, I used most low graphics settings to get acceptable FPS, so I never tried this setting. And now comes the best: the FPS is stable around 30-40 (ok, it is not the world, but fair enough for playing and still allows for these rather nice graphics settings as God rays, or Bloom effects).
Hope that helps
