Game works Perfect in Editor but crashes once packaged

Game works after being packed but once you die and its time to respawn the controlled character it crashes.

I get this error:
Assertion failed: Result [File:Runtime/CoreUObject/Public/UObject\Stack.h] [Line: 225]

Iv’e attached the full log.
I have no idea how to fix this please help.
link text

Are you getting the world location in any of your blueprints? If so, there is a known issue, UE-16915, that is related to this crash. The crash has been resolved as of 4.9, so try upgrading your project to that version and see if it still occurs after you package it out.

This worked for me. Thank you.
Mark as resolved lol