As I said, local Volume Deformation crashes if you don’t use it VERY carefully.
But unlike the local Perspective, it at least allows for some gentle corrections, which could be the appropriate use case for it (??) → see the quoted excerpt from the manual.
The vignetting (I think) comes from your lens. You might want to start with my dop file (your original + 2 VCs), which btw uses the DxO default preset.
I recommend removing the dark corners using the clone tool as it is easier and you may avoid further crashes … unless your goal is to “test” VP5 (for that I’m out of the game).