# the last caretaker crash report crash 

**URL:** <https://forums.unrealengine.com/t/the-last-caretaker-crash-report-crash/2769759>\
**Category:** UDK Projects\
**Tags:** unreal-engine, crash\
**Created:** [September 14, 2026, 5:31pm UTC](https://forums.unrealengine.com/t/the-last-caretaker-crash-report-crash/2769759 "2026-09-14T17:31:30Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![SKY6519](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@SKY6519](https://forums.unrealengine.com/u/SKY6519)\
**Post date:** [September 14, 2026, 5:31pm UTC](https://forums.unrealengine.com/t/the-last-caretaker-crash-report-crash/2769759/1 "2026-09-14T17:31:30Z")

</div>

LowLevelFatalError [File:D:\jenkins\workspace\Package-Main\Engine\Source\Runtime\CoreUObject\Private\Serialization\AsyncLoading2.cpp] [Line: 9723]  
ObjectSerializationError: /Game/Maps/Empty (0x28403ACA9CBE4BCC) /Game/Maps/Empty (0x28403ACA9CBE4BCC) - NavigationSystemModuleConfig /Game/Maps/Empty.Empty:PersistentLevel.VoyageWorldSettings.NavigationSystemModuleConfig\_0: Serial size mismatch: Expected read size 29, Actual read size 10