URGENT - PLEASE HELP

Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\Serialization\LargeMemoryReader.cpp] [Line: 22]
Tried to initialize an FLargeMemoryReader with a null or empty buffer. Archive name: None.

feel like crying, none of my auto saves are working and cant open my project up

Hello there @StephenCuthbert!

The error you are encountering has popped up in other threads accross the community, and it’s usually tied to corrupt, missing, or invalid assets in the project. Let’s tackle a few ways to resolve it:

  • First step, the most simple, open a new map, to ensure the crash is isolated to that project, and not a general issue with UE

  • Go to your project directoty and delete the following folders: DerivedDataCache, Intermediate, Saved, and Binaries

  • Check for any recently added assets, especially custom or FAB elements, and disable them from engine (use the alternative map, since your project is not opening)

  • Rebuild the project from Visual Studio, via right click right-click your .uproject file and selecting “Generate Visual Studio project files”

  • If the issue persists, please send us the extended crash log, which can be found following this guide: Crash Reporting in Unreal Engine | Unreal Engine 5.5 Documentation | Epic Developer Community