# UEFN ERORRS

**URL:** <https://forums.unrealengine.com/t/uefn-erorrs/2337635>\
**Category:** UEFN Validation\
**Tags:** unreal-engine, unreal-editor-for-fortnite, editor\
**Created:** [February 16, 2025, 10:21pm UTC](https://forums.unrealengine.com/t/uefn-erorrs/2337635 "2025-02-16T22:21:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![user\_569980f59ed52c489e58ac7ed8e2df7af80e75b2024a65f93a96b0](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@user\_569980f59ed52c489e58ac7ed8e2df7af80e75b2024a65f93a96b0](https://forums.unrealengine.com/u/user_569980f59ed52c489e58ac7ed8e2df7af80e75b2024a65f93a96b0)\
**Post date:** [February 16, 2025, 10:21pm UTC](https://forums.unrealengine.com/t/uefn-erorrs/2337635/1 "2025-02-16T22:21:03Z")

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![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/a/2/7/a276a1b290215bef2d0c746de65651913763b4c7.png)

got around 600 of these would appreiate help due to being unable to load project at all.

AssetCheck: Error: /Engine/Functions/Engine\_MaterialFunctions02/Utility/BreakOutFloat2Components Failed to load referencer to validate it: Failed to copy package file to C:/Users/yooha/AppData/Local/UnrealEditorFortnite/Saved/M\_Checkpoint\_Activate\_425: error code 1 /Game/Athena/Items/Traps/Checkpoint/M\_Checkpoint\_Activate  
AssetCheck: Error: /Engine/Functions/Engine\_MaterialFunctions02/Utility/BreakOutFloat2Components Failed to load referencer to validate it: Failed to copy package file to C:/Users/yooha/AppData/Local/UnrealEditorFortnite/Saved/M\_CP\_Device\_Hologram\_426: error code 1 /Game/Creative/Devices/Generic/Materials/M\_CP\_Device\_Hologram  
AssetCheck: Error: /Engine/Functions/Engine\_MaterialFunctions02/Utility/BreakOutFloat2Components Failed to load referencer to validate it: Failed to copy package file to C:/Users/yooha/AppData/Local/UnrealEditorFortnite/Saved/M\_FX\_TriangleScroll\_427: error code 1 /Game/UI/Foundation/Onboarding/Materials/M\_FX\_TriangleScroll

got around 600 of these would appreiate help due to being unable to load project at all.

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<div class="post-metadata">

**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\
**Post date:** [February 18, 2025, 1:42am UTC](https://forums.unrealengine.com/t/uefn-erorrs/2337635/2 "2025-02-18T01:42:45Z")

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> [@user\_569980f59ed52c489e58ac7ed8e2df7af80e75b2024a65f93a96b0](#):
>
> C:/Users/yooha/AppData/Local/UnrealEditorFortnite/Saved

C:/Users/yooha/AppData/Local is still hidden and therefore cannot be written by apps  
try starting opening epic games launcher as "run as Administrator " start UEFN possibly Windows 11 protection error C:/Users/yooha/AppData