Try deleting any Lustland content that's in your "%localappdata%"
Just run that with Run... open Run and then open the localappdata folder and search "Lustland" or w/e and delete it, then re-run the game... try that
I've had both problems, I deleted the lustland folder from appdata just recently and it worked to get to me thru to the start screen, but previously to that when I ran ultra it could only run for a few minutes or even a few seconds some times and it generated the message more like the one posted by
SlobberGoat with the extra info under the "fatal error" text
I had the frame rate displayed while playing and it was over 60-120fps almost always, never seemed to struggle or even hang on frames at all while it did run, the system fans didn't go fast like it had a big load, I reduced the global setting to high and it became stable enough to run for an hour with no crashing using
Windows 11 (64 bit) 22H2
AMD Ryzen 9 5950X 16-Core Processor
NVIDIA GeForce RTX 3080 Ti
32GB RAM
All drivers up to date
I know very little about software, but I get the impression the software has more problems than just running heavy after my experience using it
Edit:
This is the error I get when running ultra, it usually happen in transition points, like when I'm about to open a camp fire and when I'm about to go into a scene with a tentacle or another woman
This one occasionally during sex scenes
Lower video settings is the only real option for me I think
I tried running chkdik, dick cleanup, update dricker checks and Direct DiX updates, nothing else works