Validation failed: Can not launch session - Error: Failed to find public assets

General Issues and Bug Reporting
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1

Summary

LogValkyrieSyncProject: Error: Failed to find public assets [Failed to read C:/Users/David/Documents/Fortnite Projects/BeachTycoon3/Content/ExternalActors/BeachTycoon3/9/2D/CLTZ7AB9RFO9629AO8H1S1.uasset]
LogValkyrieSyncProject: Display: Finished basic user validation with an internal error
LogValkyrieSyncProject: Display: Profile SyncProject.Validate, 14.159182
LogValkyrieSyncProject: Display: Profile Begin SyncProject.Complete
LogValkyrieSummary: Project BeachTycoon3 failed to update
LogValkyrieActivityTracker: Warning: Upload → Fail Activity: BeachTycoon3 - Project validation failed
LogValkyrieSyncProject: Display: Profile SyncProject.Complete, 0.020600
LogValkyrieSyncProject: Display: Profile SyncProject, 24.850420
LogValkyrieEditorAnalytics: Displaying Stats for Flow
LogValkyrieEditorAnalytics: =========================
LogValkyrieEditorAnalytics: Flow=Play
LogValkyrieEditorAnalytics: PlayFlow=28.251
LogValkyrieEditorAnalytics: ↳ PrepareProjectSourceData=28.251
LogValkyrieEditorAnalytics: ↳ ProjectUpload=24.851
LogValkyrieEditorAnalytics: ↳ SyncWithContentService=1.695
LogValkyrieEditorAnalytics: ↳ UpdateProjectMetadata=0.668
LogValkyrieEditorAnalytics: ↳ InitSyncModules=6.635
LogValkyrieEditorAnalytics: ↳ StageProjectModules=1.638
LogValkyrieEditorAnalytics: ↳ GatherFilesForValidation=0.000
LogValkyrieEditorAnalytics: ↳ DownloadPublishedVerseFiles=0.670
LogValkyrieEditorAnalytics: ↳ ValidateProject=13.490
LogValkyrieEditorAnalytics: =================================
LogSlate: Window ‘Unable to Play’ being destroyed
Message dialog closed, result: Ok, title: Unable to Play, text: Validation failed
LogValkyrie: Unable to play: Validation failed
LogValkyrieFortniteEditorLiveEdit: Verbose: FValkyrieFortniteEditorLiveEdit::UploadEnd C:/Users/David/Documents/Fortnite Projects/BeachTycoon3/BeachTycoon3.uefnproject, EValkyrieSyncProjectState::Failed
LogValkyrieFortniteEditorLiveEdit: Verbose: FValkyrieFortniteEditorLiveEdit::SetUploadRequired 1
LogValkyrieFortniteEditorLiveEdit: Verbose: FValkyrieFortniteEditorLiveEdit::SetTrackingUploadRequired 0
LogValkyrieRequestManagerEditor: OnProjectSyncCompleted: C:/Users/David/Documents/Fortnite Projects/BeachTycoon3/BeachTycoon3.uefnproject, EValkyrieSyncProjectState::Failed
LogValkyrieActivityTracker: Warning: Upload → Fail Activity: UploadProjects - All uploads failed with errors
LogSlate: Took 0.003133 seconds to synchronously load lazily loaded font ‘../../../Engine/Content/Slate/Fonts/DroidSansMono.ttf’ (77K)
LogSlate: Took 0.005824 seconds to synchronously load lazily loaded font ‘../../../Engine/Content/Slate/Fonts/DroidSansFallback.ttf’ (3848K)
LogSourceControl: Branch diff branch 0197ef7594de7b9194bc6fe28f993b18 revision de45ff05c1ae3fe78f04c4016c5bd51725984572121dafb3be65119217fdd9cc → branch e726318bbc3fd75ac8733a7e030cc35b revision 8eeadaa5da0782cbf97f223f35f8a2c7b9864df0e29db9fa79f4bcdff6c59011
LogSourceControl: Revision diff base 8eeadaa5da0782cbf97f223f35f8a2c7b9864df0e29db9fa79f4bcdff6c59011 source de45ff05c1ae3fe78f04c4016c5bd51725984572121dafb3be65119217fdd9cc target 8eeadaa5da0782cbf97f223f35f8a2c7b9864df0e29db9fa79f4bcdff6c59011
LogSourceControl: Calculating diff between
base 494 → 8eeadaa5da0782cbf97f223f35f8a2c7b9864df0e29db9fa79f4bcdff6c59011
source 503 → de45ff05c1ae3fe78f04c4016c5bd51725984572121dafb3be65119217fdd9cc
target 494 → 8eeadaa5da0782cbf97f223f35f8a2c7b9864df0e29db9fa79f4bcdff6c59011
LogSourceControl: Diff source branch revisions
LogSourceControl: Sorting 93 source changes
LogSourceControl: Diff target branch revisions
LogSourceControl: Sorting 0 filtered target changes
LogSourceControl: Found 93 changes on source branch, resulting in 0 filtered changes on target branch
LogEOSSDK: LogEOS: Updating Product SDK Config, Time: 313.224121
LogEOSSDK: LogEOS: SDK Config Product Update Request Completed - No Change
LogEOSSDK: LogEOS: ScheduleNextSDKConfigDataUpdate - Time: 314.558167, Update Interval: 325.432281
LogEOSSDK: LogEOS: Updating Product SDK Config, Time: 318.405609
LogEOSSDK: LogEOS: SDK Config Product Update Request Completed - No Change
LogEOSSDK: LogEOS: ScheduleNextSDKConfigDataUpdate - Time: 319.740723, Update Interval: 330.685760

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Stability

Steps to Reproduce

Just trying to launch a session

Expected Result

Session launched

Observed Result

Validation failed

Platform(s)

PC UEFN

Island Code

Not yet

2

I don´t find the button to attach the logs. Updating them to Google drive

3

Asset Validation Issues - General / Issues and Bug Reporting - Epic Developer Community Forums

4

I have a problem finding a public assets that does not exist in my experience

LogValkyrieSyncProject: Error: Failed to find public assets [Failed to read C:/Users/David/Documents/Fortnite Projects/BeachTycoon3/Content/ExternalActors/BeachTycoon3/9/2D/CLTZ7AB9RFO9629AO8H1S1.uasset]

5

I just entered the folder and deleted that asset. I don´t know witch asset was and the problem is solved now, but this is not great as I am not sure witch asset does not exist anymore in the project.

I remember that months ago I could see the asset in the Outliner, this was not the case

Edit:

imagen_2025-07-10_103246997
imagen_2025-07-10_103246997738×189 45.7 KB

I think is was a simple wooden fence, not even an asset made by us. This is type of stability is very dangerous and it should solved asap. We had luck that it was only one asset

1 Like