AutomationTool is crashing which is one of build tools, nothing related to game or engine code
MainFrameActions: Packaging (Windows (64-bit)): Program.Main: ERROR: AutomationTool terminated with exception:
MainFrameActions: Packaging (Windows (64-bit)): Program.Main: ERROR: Exception in mscorlib: An item with the same key has already been added.
You might try to rebuild it if you have UE4 source, or there something unexpected (for AutomationTool) in your system, it would mean it’s a bug