It might be very difficult to track the problem. In my experience the crashes seem to be at complete random. Sometimes it’ll be the same spot (yesterday it crashed before I got to the character screen multiple times until I just restarted my pc, after which it was fine again. The day before it was in the inverted spire but it wasn’t in the same spot each time and the third try I got through without a crash) Without it being consistently from the same thing each time I can’t imagine it is easy to diagnose the issue. Verifying the files in steam like the error says to never does anything, that much I know.