[BLOCKER]Regression in 27.10, can't start session/upload private version

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Stability

Summary

Over-night starting session and uploading my project stopped working. I’ve tried few older versions from yesterday, a week and 2 weeks ago and nothing works.

I’m guessing something changed on your backend already for the 27.10 update as the log is:

[2023.11.14-11.01.14:764][569]LogValkyrieScratchManifest: Display: Profile Begin SyncProject.PruneScratchSpaceFiles.ScratchManifest.LoadFromCloud
[2023.11.14-11.01.14:764][569]LogValkyrieScratchManifest: Display: Profile Begin SyncProject.PruneScratchSpaceFiles.ScratchManifest.LoadFromCloud.FetchManifestLink
[2023.11.14-11.01.14:764][569]LogValkyrieScratchManifest: Display: Profile Begin SyncProject.PruneScratchSpaceFiles.ScratchManifest.LoadFromCloud.FetchManifestLink.FetchDssLinks
[2023.11.14-11.01.14:764][569]LogValkyrieScratchManifest: Display: Profile Begin SyncProject.ScratchManifest.McpDssGetFileLinks
[2023.11.14-11.01.15:116][570]LogWindows: Error: === Critical error: ===
(…)

A bit before that is:

[2023.11.14-12.07.19:676][120]LogOnline: Verbose: MCP: Http Non-Successful Result: HttpResult: 400 Code: 0 Error: Failure ErrorCode=errors.com.epicgames.content-service.validation_error, Message=‘Content/VGiga/Generators/simple_device_cast%20copy.verse’ does not meet file name constraints (input), Raw={
“host”: “content-service.bfda.live.use1a.on.epicgames.com”,
“method”: “GET”,
“path”: “/api/content/v2/module/011287d6-477c-2563-dce5-1ba36719ce94/version/112/staged-files/Content/VGiga/Generators/simple_device_cast%2520copy.verse”,
“errorCode”: “errors.com.epicgames.content-service.validation_error”,
“errorMessage”: “‘Content/VGiga/Generators/simple_device_cast%20copy.verse’ does not meet file name constraints (input)”
}

I’ve tried to delete this file but it didn’t help. Seems like it’s stored on your servers and possibly causes this crash.

Also tried deleting AppData\Local\UnrealEditorFortnite folder but didn’t help.

Steps to Reproduce

  1. Open my project
  2. Click Project → Upload private version

Expected Result

No Crash

Observed Result

UEFN Crashes

Platform(s)

Windows

Island Code

Project id: 30a21525-4611-01ad-971d-8bbe69cc8a97

Additional Notes

Sent UEFN Crash GUID: CrashGUID>UECC-Windows-71D2957540037D8E4C8D43AD5CD2522C_0000