UEFN crash after any project load

General Issues and Bug Reporting
, , , ,
1

Summary

The editor crashes as soon as I take control and attempt to move the viewport camera. This happens with any project including empty ones.

LoginId:6083e4fe4dc10b6f4c15dba6347e66fb
EpicAccountId:20c51b9cf1ed4d849d7cad9e0eabcf48

Unhandled Exception: 0x80000003

libcef

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Stability

Steps to Reproduce

  1. Load Project
  2. Interact with Editor
  3. Observe crash

Expected Result

No crash

Observed Result

Crash

Platform(s)

UEFN

Upload an image

UECC-Windows-81FAA3EB4D58A2BA0A2E009F49A6951F_0000.zip (533 KB)

Additional Notes

I have tried clearing the cache, updated all drivers, verified files.

2

Adding a recording that demonstrates the exact user experience when the crash occurs. Note Macolik sent this video to me and I thought it would be helpful for troubleshooting and am including it here.

4

I’m experiencing something similar. Pretty much as soon as UEFN loads up my list of projects it crashes. This only started happening today for me.

5

hi @OKomili ,

Your projects are running from OneDrive is possibly the reason, as when OneDrive briefly loses connection, do your project files get occasionally or temporarily corrupted!

There is a warning message about not using OneDrive
When opening a new blank project in UEFN

See the log error messages
‘C:/Users/imkeh/OneDrive/Documents/Fortnite Projects/BossRL/References

You should be using a Local SSD
‘C:/Users/imkeh/Documents/Fortnite Projects/BossRL/References

Copy the whole project to C:/Users/imkeh/Documents/Fortnite Projects/BossRL

and
Warning: Failed to begin reading directory changes for C:/Users/imkeh/OneDrive/Documents/Fortnite Projects/BossRL/References. Error: Das System kann die angegebene Datei nicht finden. (0x00000002)

Change the Windows 11 default path in UEFN

C:/Users/imkeh/Documents/Fortnite Projects

[2025.11.24-10.27.06:318][ 48]MapCheck: Kartenprüfung abgeschlossen: 0 Fehler, 0 Warnung(en), dauerte 517,892ms bis zum Abschluss.
[2025.11.24-10.27.06:499][ 48]LogDirectoryWatcher: Display: CreateFile failed for
‘C:/Users/imkeh/OneDrive/Documents/Fortnite Projects/BossRL/References’
. GetLastError code [2]
[2025.11.24-10.27.06:499][ 48]LogDirectoryWatcher: Warning: Failed to begin reading directory changes for C:/Users/imkeh/OneDrive/Documents/Fortnite Projects/BossRL/References. Error: Das System kann die angegebene Datei nicht finden. (0x00000002)
[2025.11.24-10.27.06:519][ 48]LogValkyrie: Display: Successfully opened project ‘C:/Users/imkeh/OneDrive/Documents/Fortnite Projects/BossRL/BossRL.uefnproject’ (took 190.92 sec)
[2025.11.24-10.27.06:638][ 48]LogSlate: Window ‘Projektbrowser’ being destroyed

1 Like
7

The status of FORT-1023643 changed to ‘Needs Triage’. We’ve confirmed the issue and it’s waiting to be assigned to someone to fix it.

8

Hey,

Thank you for the response. I’ve tried setting up a fresh project directly under C:\… but still observing the same issue sadly. I’m attaching the latest logs here

UECC-Windows-CEA15F4E4E2B0090DA2E0B94DA0E44CD_0000.zip (498.2 KB)

I’ve also tried changing the directory for the BossRL project as you suggested but crashing here as well. These are the logs:

UECC-Windows-B0CB60704DB3BA124D77308AA217BA9D_0000.zip (634.0 KB)

As a precaution I’ve completely disabled OneDrive syncing but that does not seem to have an effect.