Fail to validate candidate module versions , An error has occurred when game start

LogValkyrieSummary: Valkyrie Beacon Connected!
LogValkyrieBeacon: AValkyrieBeaconClient::BeginPlay - Adding prewarm version to the content beacon ++Fortnite+Release-36.20-CL-43847582.
LogValkyrieActivityTracker: Session → Complete Activity: ConnectToBeacon
LogValkyrieActivityTracker: Session → Channel State: Completed Successfully
LogValkyrieRequestManagerEditor: OnValkyrieBeaconConnected - Valkyrie beacon successfully just connected
LogValkyrieRequestManagerEditor: Fetching PersistenceBehaviorEditSession from actor: IslandSettings_0 : Device_ExperienceSettings_V2_UEFN_C
LogValkyrieRequestManagerEditor: FValkyrieRequestManagerEditor::PostSessionLaunchData - Posting session launch data with sessionID: 6a06b86725f54b48aa178da7c18889c5
LogValkyrieSummary: Connected to Session: 6a06b86725f54b48aa178da7c18889c5
LogValkyrieSummary: Session Setup Complete. About to Send Content!
LogNet: NotifyAcceptingChannel 4/Editor client ValkyrieBeaconClient_17
LogNet: Client accepting Editor channel
LogValkyrieRequestManagerEditor: PostSessionLaunchDataCallback - Session launch data succesfully posted for sessionID: 6a06b86725f54b48aa178da7c18889c5
LogValkyrie: FlowStep_ResolveSessionCandidates()
LogValkyrie: Error: FlowStep_ResolveSessionCandidates(): Candidate module [0806df9f-4307-3e7f-42bc-1cb1851ec72f] failed validation with error: [http_error_500:valkyrie-cook-api.prod.ucs.on.epicgames.com]
LogValkyrieEditorAnalytics: Displaying Stats for Flow
LogValkyrieEditorAnalytics: =========================
LogValkyrieEditorAnalytics: Flow=Play
LogValkyrieEditorAnalytics: PlayFlow=51.185
LogValkyrieEditorAnalytics: ↳ PrepareProjectSourceData=7.450
LogValkyrieEditorAnalytics: ↳ UploadCookDownload=51.185
LogValkyrieEditorAnalytics: ↳ ValidationSessionInitializeContext=1.649
LogValkyrieEditorAnalytics: ↳ ValidationSessionRunLocalValidation=5.655
LogValkyrieEditorAnalytics: ↳ ProjectValidation=5.224
LogValkyrieEditorAnalytics: ↳ SyncWithContentService=1.265
LogValkyrieEditorAnalytics: ↳ UpdateProjectMetadata=0.624
LogValkyrieEditorAnalytics: ↳ InitSyncModules=1.066
LogValkyrieEditorAnalytics: ↳ StageProjectModules=0.608
LogValkyrieEditorAnalytics: ↳ GatherFilesForValidation=0.000
LogValkyrieEditorAnalytics: ↳ DownloadPublishedVerseFiles=0.593
LogValkyrieEditorAnalytics: ↳ ValidateProject=1.067
LogValkyrieEditorAnalytics: ↳ FindServer=2.510
LogValkyrieEditorAnalytics: ↳ MatchmakingToServer=1.070
LogValkyrieEditorAnalytics: ↳ ValidationSessionUploadCandidateSourceFiles=1.355
LogValkyrieEditorAnalytics: ↳ ValidationSessionCreateValidationSession=0.254
LogValkyrieEditorAnalytics: ↳ ValidationSessionCreateModuleVersions=41.792
LogValkyrieEditorAnalytics: ↳ ValidationSessionPruneScratchSpace=0.953
LogValkyrieEditorAnalytics: ↳ ValidationSessionResolveSessionCandidates=0.223
LogValkyrieEditorAnalytics: =================================
LogSlate: Warning: Vector cache flush requested. Reason: Large atlases out of space; 2/1 Textures; frames since last flush: 18413811162125570294
LogSlate: Warning: Setting the threshold to trigger a flush to 2 non-atlased textures as there is a lot of font data being cached.
LogSlate: InvalidateAllWidgets triggered. All widgets were invalidated
LogSlate: Window ‘Unable to Play’ being destroyed
Message dialog closed, result: Ok, title: Unable to Play, text: Failed to validate candidate module versions
LogValkyrie: Unable to play: Failed to validate candidate module versions
LogEOSSDK: LogEOSPresence: Updating Presence to Online. LocalUserId=[8d3…8a8] RichText=
LogSlate: Took 0.000167 seconds to synchronously load lazily loaded font ‘../../../Engine/Content/Slate/Fonts/DroidSansMono.ttf’ (77K

I don’t know how to handle this error. I can’t start test game

even though I made new project, I can’t start game, because of this

Just tried to Launch Session and got same problem! I think it’s something recent?? Hope they work on it. IDK

It’s nice to meet someone who’s going through the same thing as I am. Thank you for sharing your thoughts.

i had the same issue, it’s now fixed

same here

Happening to me too, glad to know i didnt break anything lol.

what did you do to fix it?? Got same issue - tearing my hair out :cry:

I Fixed it here: Failed to validate candidate module versions [SOLVED]