Hey there @Jau_Studio! This is a tough one, as it seems like your asset cook is completing, but then it hits a memory access error. It seems to be happening during the final garbage cleanup process PurgeAllUObjectsOnExit → IncrementalPurgeGarbage → UnhashUnreachableObjects → UObject::ConditionalBeginDestroy. This makes the issue a tough one. It won’t point out specifically what data it’s tripping up on.
If possible, could I see the full crash log from YourProjectFolder/Saved/Crashes/? It might provide a bit more context.
If an object is the problem, you’ll probably have to rely on the tried and true binary search by removing things that could be at fault until things work then narrowing down exactly what’s failing.