World not loading / Visual Glitches (Split Fiction)

Hi, we're experiencing severe visual problems which make the game impossible to play, except for the first chapter. It could be some kind of shader issue. We're not able to really move, just some camera movement and sounds are working. We were able to play the game past chapter 1 before, but after taking a break for a week or two, the game no longer works. (Maybe a recent update?) Any checkpoints we try to load, the visuals are completly broken. (see screenshot). Then tried to fix it by installing the newest graphics driver for my GTX 970 (I'm aware it's on the low end of supported graphics cards, but it worked before just fine), after installing the newest drivers the shaders got recalculated for longer than usual on launch, but the issue persists.  Also tried lowering various settings, lowering resolution etc. Tried verifying integrity with Steam too, and all files verified successfully. Screenshot 1 is from "Big City life" checkpoint.  Some other levels are just a black screen, others are with broken visuals like the screenshot. Music is playing, the only thing that moves on screen are the UI character position indicators, (UI in general works), also seem to be constantly falling. Basically it seems to me like the levels don't load correctly,  (it doesn't take enough time to load either, but even if I wait, it doesn't fix itself). What however works is the menu level, and all the "Rader Publishing" levels, the intro cutscene works, etc.