Any updates on this @Flak @HeyPickledDave ?
If it happens again it is worth trying to select everything in the outliner, right click “Save Selected Actors”. That usually fixes weird stuff for me.
1 Like
What worked for me to fix this:
I deleted the folder C:\Users\YourName\AppData\Local\UnrealEditorFortnite
(don’t worry, it will regenerate automatically).
Then, I created a blank map and launched a session it worked then After that I opened my main map and launched a session it worked/
Disclaimer: I’m not sure why this happened or exactly what I did, but this method worked for me and is safe, Also you need to start a session in a new blank map first then your main map.
Hey @Flak @HeyPickledDave , I’m having the exact same issue as MartinBobbio, can you clean my account cache too I really need to post my map very soon 
We’ll get someone to take a look.
FORT-1039603 has been added to our ‘To Do’ list. Someone’s been assigned this task.
Are you positive about this? Idk if I’m getting pranked. I’m terrified at the idea of deleting everything by doing this.
@Flak I’m having the same issue. Any chance I could get a hand with this?
@Flak I’m having the same issue. Any chance I could get a hand with this?
I was eventually able to get past this. It’s possible low disk space due to local caching of fortnite/uefn/graphics caused this.
Hello @Flak @HeyPickledDave I have exactly the same problem. I’ve already tried almost everything, can you clean my account cache too. LogValkyrie: Error: FlowStep_ResolveSessionCandidates(): Candidate module [1e900d79-4575-93e8-88e6-4a9d63f3da4f] failed validation with error: [errors.com.epicgames.pre-processing.download_failure]
I delete the folder C:\Users\YourName\AppData\Local\UnrealEditorFortnite and the error is gone
Posted about this problem its going to be fixed in 40.00 and thats ONLY six 6 days away 19th March. Please Just wait until the new function.
Our team is still having this issue in the new update 40.00.
I have another time the same error could you clean my account cache? I need to update my map for the weekend, thank you
LogValkyrie: Error: FlowStep_ResolveSessionCandidates(): Candidate module [f29e877c-4b11-e2b4-550b-6597e39d973b] failed validation with error: [errors.com.epicgames.pre-processing.download_failure]
LogValkyrieFortniteEditorLiveEdit: Verbose: FValkyrieFortniteEditorLiveEdit::UploadEnd C:/Users/Usuario/Documents/Fortnite Projects/Fortnite_Go_Up_For_All_Brainrots/Fortnite_Go_Up_For_All_Brainrots.uefnproject, Failed
LogValkyrieFortniteEditorLiveEdit: Verbose: FValkyrieFortniteEditorLiveEdit::SetUploadRequired 1
LogValkyrieFortniteEditorLiveEdit: Verbose: FValkyrieFortniteEditorLiveEdit::SetTrackingUploadRequired 0
LogValkyrieRequestManagerEditor: OnProjectSyncCompleted: C:/Users/Usuario/Documents/Fortnite Projects/Fortnite_Go_Up_For_All_Brainrots/Fortnite_Go_Up_For_All_Brainrots.uefnproject, Failed
LogValkyrieEditorAnalytics: Displaying Stats for Flow
LogValkyrieEditorAnalytics: =========================
LogValkyrieEditorAnalytics: Flow=Play
LogValkyrieEditorAnalytics: PlayFlow=231.550
LogValkyrieEditorAnalytics: ↳ PrepareProjectSourceData=9.891
LogValkyrieEditorAnalytics: ↳ UploadCookDownload=231.550
LogValkyrieEditorAnalytics: ↳ ValidationSessionInitializeContext=5.160
LogValkyrieEditorAnalytics: ↳ ValidationSessionRunLocalValidation=4.634
LogValkyrieEditorAnalytics: ↳ SyncWithContentService=0.962
LogValkyrieEditorAnalytics: ↳ UpdateProjectMetadata=0.283
LogValkyrieEditorAnalytics: ↳ InitSyncModules=1.314
LogValkyrieEditorAnalytics: ↳ StageProjectModules=0.354
LogValkyrieEditorAnalytics: ↳ GatherFilesForValidation=0.000
LogValkyrieEditorAnalytics: ↳ DownloadPublishedVerseFiles=0.000
LogValkyrieEditorAnalytics: ↳ ValidateProject=1.415
LogValkyrieEditorAnalytics: ↳ FindServer=214.305
LogValkyrieEditorAnalytics: ↳ MatchmakingToServer=212.576
LogValkyrieEditorAnalytics: ↳ ValidationSessionUploadCandidateSourceFiles=4.760
LogValkyrieEditorAnalytics: ↳ ValidationSessionCreateValidationSession=0.256
LogValkyrieEditorAnalytics: ↳ ValidationSessionCreateModuleVersions=216.386
LogValkyrieEditorAnalytics: ↳ ValidationSessionPruneScratchSpace=216.386
LogValkyrieEditorAnalytics: ↳ ValidationSessionResolveSessionCandidates=0.231
LogValkyrieEditorAnalytics: =================================
This is my project id
b13b5d7c-4167-c871-c92b-53ada5e21689
@Flak same issue here
@Flak I’m also having this issue even after the 40.00 update I did every single step you suggested ive been stuck here all day trying to fix it. Would be great if you could help
Thanks for flagging, I’ll let the devs know.
1 Like
Thank you so much Flak
1 Like
Any updates on this?