For the moment it can be worked around by launching the game with the -Windowed command-line argument. Edit: Once you get in-game it should be fine to set window mode to Borderless (but not Fullscreen).
Unfortunately the crash is related to my over-exuberant upgrade to Unreal 4.23. Usually I would wait until the .1 patch comes out, but in this case I was hoping to get a physics bug taken care of. I’ll merge us with the .1 patch as soon as it comes out to get this fixed up.
Thank you to LuisVip, Great Hero J and MoltonMontro for the crash reports!