# \[CRITICAL\] Failed to cook, character is being killed in the uefn lobby **URL:** \ **Category:** Issues and Bug Reporting\ **Tags:** fortnite-creative, unreal-editor-for-fortnite, fixed, fortnite\ **Created:** [June 15, 2025, 10:46pm UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279 "2025-06-15T22:46:23Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![latundaPC](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/latundapc/32/1068800_2.png) [@latundaPC](https://forums.unrealengine.com/u/latundaPC)\ **Post date:** [June 15, 2025, 10:46pm UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/1 "2025-06-15T22:46:23Z")
### Summary PlatformCook: Error: We hit an error while cooking this content PlatformCook: Error: errors.com.epicgames.content-service.cook\_failure PlatformCook: Error: CookJobId:103d7fb0-f9d9-4758-a70b-826afd768d2d PlatformCook: Error: An error occurred while communicating with the game servers (failed to cook module eff3d2b7-4188-0a07-bda7-4c983d8d4949 (artifact 8912dbdb-8b90-49e8-86c9-0eecfeab3a98:pc) (cookJobId 103d7fb0-f9d9-4758-a70b-826afd768d2d) with error code errors.com.epicgames.cookplugin.cookfailure). LogValkyrieEditorAnalytics: Displaying Stats for Flow LogValkyrieEditorAnalytics: ========================= LogValkyrieEditorAnalytics: Flow=Play LogValkyrieEditorAnalytics: PlayFlow=421.609 LogValkyrieEditorAnalytics: ↳ PrepareProjectSourceData=159.148 LogValkyrieEditorAnalytics: ↳ ProjectUpload=114.932 LogValkyrieEditorAnalytics: ↳ SyncWithContentService=2.341 LogValkyrieEditorAnalytics: ↳ UpdateProjectMetadata=1.000 LogValkyrieEditorAnalytics: ↳ InitSyncModules=4.478 LogValkyrieEditorAnalytics: ↳ StageProjectModules=30.757 LogValkyrieEditorAnalytics: ↳ GatherFilesForValidation=0.026 LogValkyrieEditorAnalytics: ↳ DownloadPublishedVerseFiles=5.022 LogValkyrieEditorAnalytics: ↳ ValidateProject=71.176 LogValkyrieEditorAnalytics: ↳ FindServer=14.422 LogValkyrieEditorAnalytics: ↳ MatchmakingToServer=10.901 LogValkyrieEditorAnalytics: ↳ UploadCookDownload=248.039 LogValkyrieEditorAnalytics: ↳ ProjectUpload=137.321 LogValkyrieEditorAnalytics: ↳ SyncWithContentService=1.844 LogValkyrieEditorAnalytics: ↳ UpdateProjectMetadata=0.759 LogValkyrieEditorAnalytics: ↳ InitSyncModules=1.671 LogValkyrieEditorAnalytics: ↳ StageProjectModules=2.853 LogValkyrieEditorAnalytics: ↳ PruneScratchSpaceFiles=6.127 LogValkyrieEditorAnalytics: ↳ UploadFiles=94.279 LogValkyrieEditorAnalytics: ↳ CreateModuleVersions=29.665 LogValkyrieEditorAnalytics: ↳ StoreSnapshot=0.761 LogValkyrieEditorAnalytics: ↳ ServerClientCookUnloadLoad=110.721 LogValkyrieEditorAnalytics: ================================= LogValkyrieActivityTracker: Warning: Session → Fail Activity: LoadingNewContent - Error updating content ### Please select what you are reporting on: Unreal Editor for Fortnite ### What Type of Bug are you experiencing? Assets ### Steps to Reproduce Open a 33.30 project Rebuild landscape (yellow triangle) Launch session Save all updated assets ### Expected Result Can start game ### Observed Result There is no lego minifigure in the lobby Fortnite character is killed in the uefn lobby (where there are hexagons and trees) ### Platform(s) Windows ---
**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 16, 2025, 10:08am UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/2 "2025-06-16T10:08:45Z")
hi @latundaPC , Please read another post which is being worked on and a similar problem [[MAJOR] Cook Failure Out Of Memory - General / Issues and Bug Reporting - Epic Developer Community Forums](https://forums.unrealengine.com/t/major-cook-failure-out-of-memory/2538437/16) ---
**Author:** ![latunda](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/latunda/32/1047041_2.png) [@latunda](https://forums.unrealengine.com/u/latunda)\ **Post date:** [June 16, 2025, 7:22pm UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/4 "2025-06-16T19:22:18Z")
I think I did not have the “outofmemory” part in the error message. ---
**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 16, 2025, 7:47pm UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/5 "2025-06-16T19:47:35Z")
> [@latunda](#): > > think I did not have the “outofmemory” part in the error message. Hi Probably have to wait until Epic have finished. There are six entries about cook failure this month, but over 20 over the last six months, currently some errors occur on PC but not on console Launches. This problem is far deeper then we indie dev can understand and replicate ---
**Author:** ![Puceau\_Complexe](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Puceau\_Complexe](https://forums.unrealengine.com/u/Puceau_Complexe)\ **Post date:** [June 17, 2025, 2:33pm UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/6 "2025-06-17T14:33:22Z")
I have exactly the same error as you, but I don’t understand where it comes from, when I launch a session my player dies and I get this error message : PlatformCook: Error: We made a mistake in preparing this content. PlatformCook: Error: errors.com.epicgames.content-service.cook\_failure PlatformCook: Error: CookJobId :64aac3cb-9454-4049-b8a1-05dd7de790e6 PlatformCook: Error: An error occurred while communicating with the game servers (failed to cook module 7a8a1659-491a-1cee-9e51-499853d3782a (artifact 9581f60f-4a54-4b0c-92b6-e96af1affd14:pc) (cookJobId 64aac3cb-9454-4049-b8a1-05dd7de790e6) with error I’m stuck and I wanted to post my map on Friday … if you find the solution I would love to know, Thanks, ---
**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 17, 2025, 3:04pm UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/7 "2025-06-17T15:04:16Z")
hi, Do your islands use streaming? In another post, there was cook problem . The post basically is something to do with HLOD streaming works > [@Cook fails on Push, but works with Launch](https://forums.unrealengine.com/t/cook-fails-on-push-but-works-with-launch/2548214/13): > > After removing the Streaming (`World Settings -> Enable Streaming = False`) and also removing all Data Layers (`Data Layers -> Select All -> Delete Selected Data layers`), the ability to Launch works [Cook fails on Push, but works with Launch - General / Issues and Bug Reporting - Epic Developer Community Forums](https://forums.unrealengine.com/t/cook-fails-on-push-but-works-with-launch/2548214/13) ---
**Author:** ![latunda](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/latunda/32/1047041_2.png) [@latunda](https://forums.unrealengine.com/u/latunda)\ **Post date:** [June 17, 2025, 6:09pm UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/8 "2025-06-17T18:09:33Z")
This particular project never cooks (after 36.0 while other projects work ok regardless of streaming settings). I wonder what it says in the server error. I disabled streaming and deleted data layers: LogEOSSDK: Warning: LogHttp: 00000209758D1200: request has been successfully processed. URL: [https://api.epicgames.dev/datarouter/api/v1/public/data/clients?AppID=3fd15bc288014f698cca1a3d1f01c7af&AppVersion=1.17.3600.0-43058264&AppEnvironment=fn&UploadType=eteventstream&SessionID=F4D11CAC4600DEE390C3C48BBC8B4533](https://api.epicgames.dev/datarouter/api/v1/public/data/clients?AppID=3fd15bc288014f698cca1a3d1f01c7af&AppVersion=1.17.3600.0-43058264&AppEnvironment=fn&UploadType=eteventstream&SessionID=F4D11CAC4600DEE390C3C48BBC8B4533), HTTP code: 503, content length: 81, actual payload size: 81, elapsed: 0.20s LogEOSSDK: Warning: LogHttp: 00000209758D1200 Response Header Date: Tue, 17 Jun 2025 19:15:07 GMT LogEOSSDK: Warning: LogHttp: 00000209758D1200 Response Header Content-Type: text/plain LogEOSSDK: Warning: LogHttp: 00000209758D1200 Response Header Content-Length: 81 LogEOSSDK: Warning: LogHttp: 00000209758D1200 Response Header Connection: keep-alive LogEOSSDK: Warning: LogHttp: 00000209758D1200 Response Header X-Epic-Correlation-Id: EOS-1YPw3tLl2E6XzcdQSqOteQ-HlcOfpD7jUS276aFum9tKA LogEOSSDK: Warning: LogHttp: 00000209758D1200 Response Header Server: eos-gateway LogEOSSDK: Warning: LogHttp: Lockout of 2.463942s on [https://api.epicgames.dev/datarouter/api/v1/public/data/clients?AppID=3fd15bc288014f698cca1a3d1f01c7af&AppVersion=1.17.3600.0-43058264&AppEnvironment=fn&UploadType=eteventstream&SessionID=F4D11CAC4600DEE390C3C48BBC8B4533](https://api.epicgames.dev/datarouter/api/v1/public/data/clients?AppID=3fd15bc288014f698cca1a3d1f01c7af&AppVersion=1.17.3600.0-43058264&AppEnvironment=fn&UploadType=eteventstream&SessionID=F4D11CAC4600DEE390C3C48BBC8B4533) LogEOSSDK: Warning: LogHttp: Retry 1 on [https://api.epicgames.dev/datarouter/api/v1/public/data/clients?AppID=3fd15bc288014f698cca1a3d1f01c7af&AppVersion=1.17.3600.0-43058264&AppEnvironment=fn&UploadType=eteventstream&SessionID=F4D11CAC4600DEE390C3C48BBC8B4533](https://api.epicgames.dev/datarouter/api/v1/public/data/clients?AppID=3fd15bc288014f698cca1a3d1f01c7af&AppVersion=1.17.3600.0-43058264&AppEnvironment=fn&UploadType=eteventstream&SessionID=F4D11CAC4600DEE390C3C48BBC8B4533) LogEOSSDK: Warning: LogHttp: Success on [https://api.epicgames.dev/datarouter/api/v1/public/data/clients?AppID=3fd15bc288014f698cca1a3d1f01c7af&AppVersion=1.17.3600.0-43058264&AppEnvironment=fn&UploadType=eteventstream&SessionID=F4D11CAC4600DEE390C3C48BBC8B4533](https://api.epicgames.dev/datarouter/api/v1/public/data/clients?AppID=3fd15bc288014f698cca1a3d1f01c7af&AppVersion=1.17.3600.0-43058264&AppEnvironment=fn&UploadType=eteventstream&SessionID=F4D11CAC4600DEE390C3C48BBC8B4533) LogEOSSDK: Warning: LogHttp: 00000209758DAE00: request has been successfully processed. URL: [https://api.epicgames.dev/datarouter/api/v1/public/data/clients?AppID=86f32f1151354e7cb39c12f8ab2c22a3&AppVersion=1.17.3600.0-43058264&AppEnvironment=a01927f7421a4d4995673fe30ef46945&UploadType=eteventstream&SessionID=8E1D8A1E47004BFCD2038997DC852D42](https://api.epicgames.dev/datarouter/api/v1/public/data/clients?AppID=86f32f1151354e7cb39c12f8ab2c22a3&AppVersion=1.17.3600.0-43058264&AppEnvironment=a01927f7421a4d4995673fe30ef46945&UploadType=eteventstream&SessionID=8E1D8A1E47004BFCD2038997DC852D42), HTTP code: 502, content length: 122, actual payload size: 122, elapsed: 9.49s LogEOSSDK: Warning: LogHttp: 00000209758DAE00 Response Header Date: Tue, 17 Jun 2025 19:15:16 GMT LogEOSSDK: Warning: LogHttp: 00000209758DAE00 Response Header Content-Type: text/html LogEOSSDK: Warning: LogHttp: 00000209758DAE00 Response Header Content-Length: 122 LogEOSSDK: Warning: LogHttp: 00000209758DAE00 Response Header Connection: keep-alive LogEOSSDK: Warning: LogHttp: 00000209758DAE00 Response Header Server: eos-gateway LogEOSSDK: Warning: LogEOS: Error response received from backend. Response is not JSON. ServiceName=[Metrics], OperationName=[SendBackendEvent], Url=[], HttpStatus=[502], CorrId= LogNet: Warning: UNetConnection::Tick: Connection TIMED OUT. Closing connection.. Elapsed: 30.00, Real: 30.00, Good: 30.00, DriverTime: 332.65, Threshold: 30.00, [UNetConnection] RemoteAddr: 68.218.74.3:15027, Name: IpConnection\_0, Driver: Name:IpNetDriver\_0 Def:BeaconNetDriver IpNetDriver\_0, IsServer: NO, PC: NULL, Owner: ValkyrieBeaconClient\_0, UniqueId: MCP:37a216a5cca84ca2b661e5bbd14a8626 LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = ConnectionTimeout, ErrorString = UNetConnection::Tick: Connection TIMED OUT. Closing connection.. Elapsed: 30.00, Real: 30.00, Good: 30.00, DriverTime: 332.65, Threshold: 30.00, [UNetConnection] RemoteAddr: 68.218.74.3:15027, Name: IpConnection\_0, Driver: Name:IpNetDriver\_0 Def:BeaconNetDriver IpNetDriver\_0, IsServer: NO, PC: NULL, Owner: ValkyrieBeaconClient\_0, UniqueId: MCP:37a216a5cca84ca2b661e5bbd14a8626, Driver = Name:IpNetDriver\_0 Def:BeaconNetDriver IpNetDriver\_0 LogValkyrieRequestManagerEditor: Warning: Encountered Network Error! LogValkyrieRequestManagerEditor: Error: Failed to handle connection attempt (Network error occurred when connecting to a server after matchmaking completed. Error: UNetConnection::Tick: Connection TIMED OUT. Closing connection.. Elapsed: 30.00, Real: 30.00, Good: 30.00, DriverTime: 332.65, Threshold: 30.00, [UNetConnection] RemoteAddr: 68.218.74.3:15027, Name: IpConnection\_0, Driver: Name:IpNetDriver\_0 Def:BeaconNetDriver IpNetDriver\_0, IsServer: NO, PC: NULL, Owner: ValkyrieBeaconClient\_0, UniqueId: MCP:37a216a5cca84ca2b661e5bbd14a8626) LogExit: Name:IpNetDriver\_0 Def:BeaconNetDriver IpNetDriver\_0 shut down Server error again - response is not JSON and timeout. ---
**Author:** ![latundaPC](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/latundapc/32/1068800_2.png) [@latundaPC](https://forums.unrealengine.com/u/latundaPC)\ **Post date:** [June 18, 2025, 11:33pm UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/9 "2025-06-18T23:33:38Z")
Today, the Failed to cook issue was resolved for me. When I launched the editor after the 36.10 update, it told me it needs 5+GB space when I only have 3GB free. I made some space and launched the project. There was no cook error, only timeout. I then deleted 200+ assets (fortnite props) and was able to launch the session. ---
**Author:** ![AtAshTag](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/atashtag/32/997253_2.png) [@AtAshTag](https://forums.unrealengine.com/u/AtAshTag)\ **Post date:** [June 19, 2025, 12:08am UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/10 "2025-06-19T00:08:46Z")
I was hoping for a video. Never known this and i was thinking you could have the world record for the only person killed in the portal lobby 🤣 Glad they fixed it for you tho 🙂 ---
**Author:** ![Puceau\_Complexe](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Puceau\_Complexe](https://forums.unrealengine.com/u/Puceau_Complexe)\ **Post date:** [June 19, 2025, 7:54am UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/11 "2025-06-19T07:54:36Z")
Yes, it’s activated, I’ll try to deactivate it when I get back tonight to see if it works, but I don’t understand why it only happens on a “specific island” and if it works when I deactivate the “streaming” option, can I reactivate it afterwards? Oh yes, I’ve also taken over an old version with “revision control”, everything works, I can launch the game, etc., but every time I make a new modification (small or large), move an object, etc., it resets the same error message. ---
**Author:** ![latunda](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/latunda/32/1047041_2.png) [@latunda](https://forums.unrealengine.com/u/latunda)\ **Post date:** [June 19, 2025, 8:09am UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/12 "2025-06-19T08:09:27Z")
I have streaming on, I only turned it off once to test some time ago. ---
**Author:** ![Puceau\_Complexe](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Puceau\_Complexe](https://forums.unrealengine.com/u/Puceau_Complexe)\ **Post date:** [June 19, 2025, 9:45am UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/13 "2025-06-19T09:45:08Z")
Where did you see that you needed 5GB for your project? And how did you add more ( GB )? ---
**Author:** ![latunda](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/latunda/32/1047041_2.png) [@latunda](https://forums.unrealengine.com/u/latunda)\ **Post date:** [June 19, 2025, 10:23am UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/14 "2025-06-19T10:23:20Z")
I got the message on UEFN launch. I deleted screenshots and promotional videos I made to free up space. ---
**Author:** ![Vulpp](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/vulpp/32/894289_2.png) [@Vulpp](https://forums.unrealengine.com/u/Vulpp)\ **Post date:** [June 24, 2025, 11:24pm UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/15 "2025-06-24T23:24:16Z")
I’ve been encountering the same cook failure error consistently in one of my larger projects. It occurs every time and I haven’t been able to determine the cause. This issue has completely blocked any updates for this map. Here’s my error message: ```auto We hit an error while cooking this content errors.com.epicgames.content-service.cook_failure CookJobId:60cd13d8-f37c-4332-83aa-3126af50f553 An error occurred while communicating with the game servers (failed to cook module fbcd53f9-4eb5-1485-2ebc-ac85099fff59 (artifact bdf4fff1-a9f4-4b2a-9bdc-fe6d8ef686bd:pc) (cookJobId 60cd13d8-f37c-4332-83aa-3126af50f553) with error code errors.com.epicgames.cookplugin.cookfailure). ``` ---
**Author:** ![Bug-Reporter](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/bug-reporter/32/997076_2.png) [@Bug-Reporter](https://forums.unrealengine.com/u/Bug-Reporter)\ **Post date:** [July 21, 2025, 1:59pm UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/16 "2025-07-21T13:59:39Z")
FORT-924671 is ‘Closed’ as ‘Fixed’. The issue will be addressed in 36.20. ---
**Author:** ![system](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/1/3/713c9d3f58553f0de89543d76a8a3a2779dc9fa4.png) [@system](https://forums.unrealengine.com/u/system)\ **Post date:** [December 12, 2025, 10:46pm UTC](https://forums.unrealengine.com/t/critical-failed-to-cook-character-is-being-killed-in-the-uefn-lobby/2559279/17 "2025-12-12T22:46:45Z")
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