UEFN project fails to sync/open: "Cannot find project file" – revision downloads but no .uefnproject is written

Summary

One of my cloud projects cannot be opened in UEFN. Every time I open it from the Project Browser, the editor creates a new local folder, downloads revision 1 (“15 files updated”), but no project files are written to disk – only the .lore folder. The sync then fails with “Error de sincronización – Cannot find project file.” Other projects on the same account open normally.

Project title: 1v1 zero build :memo::prohibited: + spectator
Project name: p1v1zerobuildspectator
Project ID: 39e8609e-3f44-4108-85a1-a24ba7601e72
Originating island ID: c3c00ad7-dc86-469b-bcf7-62590718ce8e
Verse path: /mr.tbh002@fortnite.com/p1v1zerobuildspectator/
Source control: Unreal Revision Control (Lore)
UEFN build: ++Fortnite+Release-42.40-CL-59343437

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Lore

Steps to Reproduce

  1. Open UEFN and go to the Project Browser.
  2. Select the project “1v1 zero build :memo::prohibited: + spectator” and open it.
  3. The sync progress bar reaches 100% (“Descargando el proyecto…”) and then shows “Cannot find project file.”

Expected Result

The project downloads and opens in the editor.

Observed Result

The sync fails. The local folder only has .lore\immutable\index... (7 small pack files, ~3.5 KB in total): no .uefnproject, no Content, no Plugins. Each retry creates a new empty folder (p1v1zerobuildspectator, _, __, ___). Reproduction rate: 100% (5 out of 5 attempts).

Relevant log lines (UnrealEditorFortnite.log):
LogValkyrieOnline: Syncing project “39e8609e-3f44-4108-85a1-a24ba7601e72” with the name “p1v1zerobuildspectator”
SourceControl: Repository ‘39e8609e3f44410885a1a24ba7601e72’ initialized.
SourceControl: Revision 1 fetched on ‘main’ - 15 files updated.
LogValkyrie: Found 0 project file(s) for ‘39e8609e-3f44-4108-85a1-a24ba7601e72’.
LogValkyrieOnline: Error: Syncing project “39e8609e-3f44-4108-85a1-a24ba7601e72” failed due to: Cannot find project file.

Platform(s)

PC – Windows 11 (10.0.26200), UEFN 42.40

Island Code

9019-8834-5977

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Additional Notes

  • The project title has emojis (:memo::prohibited:). I suspect they may be involved, along with the garbled owner name (it shows as “�� � Mr.TBH002” in the Project Browser).
  • Please check whether revision 1 of this project in the cloud actually has the .uefnproject and its content, or whether it can be restored/repaired.

That error generally means the .uefnprojectis deleted from your project.

With the upcoming 43.00 release, the project data will no longer be deleted from your drive after an unsuccessful open. You could then use the CLI to lore.exe revision syncto an older revision where the .uefnprojectfile still exists and then lore.exe revision restoreit as the latest revision. Then open it again.

Who on your team deleted the .uefnprojectfile and why?