# UEFN cook error – Missing DefaultCosmetics + cook\_failure + Timeout

**URL:** <https://forums.unrealengine.com/t/uefn-cook-error-missing-defaultcosmetics-cook-failure-timeout/2548573>\
**Category:** Issues and Bug Reporting\
**Tags:** unreal-engine, unreal-editor-for-fortnite, bug-report, editor\
**Created:** [June 9, 2025, 5:13pm UTC](https://forums.unrealengine.com/t/uefn-cook-error-missing-defaultcosmetics-cook-failure-timeout/2548573 "2025-06-09T17:13:44Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**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:** [June 9, 2025, 7:13pm UTC](https://forums.unrealengine.com/t/uefn-cook-error-missing-defaultcosmetics-cook-failure-timeout/2548573/2 "2025-06-09T19:13:59Z")

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> [@besthillex](#):
>
> errors.com.epicgames.cookplugin.assetvalidationerror

assetvalidationerror = **asset validation error**

Please use the documentation  
[Validation and Fix-Up Tool in Unreal Editor for Fortnite | Fortnite Documentation | Epic Developer Community](https://dev.epicgames.com/documentation/en-us/fortnite/validation-and-fixup-tool-in-unreal-editor-for-fortnite#manual-fix-up)

[Asset Validation Issues - General / Issues and Bug Reporting - Epic Developer Community Forums](https://forums.unrealengine.com/t/asset-validation-issues/817504/14)

> PlatformCook: Error: Se ha producido un error al comunicarse con los servidores del juego (failed to cook module cae7bafd-4f55-d587-e1e6-48a302011367 (artifact f5249949-e109-4891-aea5-ad092c50e147:linux-server) (cookJobId 0176a35b-45bc-4f66-b513-eaf747704c57) with error code errors.com.epicgames.cookplugin.assetvalidationerror)

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