I’m having a nearly identical issue to this when packaging my project for Win64:
Here is a related AnswerHub post (with project logs).
I clearly have no idea what is causing the problem, since the errors report issues with overrides within the Engine source, which has not been tampered with or modified in any way. If anyone has any thoughts that could even just point me toward a possible solution I’d be greatly appreciative.
I’ve also included logs on this post for convenience.