Summary
Unreal Editor for Fortnite (UEFN) fails to launch on my Windows 11 PC.
When I click Launch in Epic Games Launcher, the status briefly changes to “Running” before returning to “Launch.” The editor never opens.
The issue persists after multiple installation verifications and a clean UEFN-only reinstall.
An earlier launch attempt displayed a missing tbb12.dll error. The freshly installed UEFN also does not contain this DLL in the two binary directories checked, although I have not established whether this version requires it.
Epic Games Launcher logs confirm that the UEFN executable starts but subsequently exits. No corresponding application error was found in Windows Event Viewer.
System specifications:
- Windows 11
- Intel Core i7-8700
- 16 GB RAM
- NVIDIA RTX 3050 6 GB
- UEFN installation:
E:\Epic Games\Fortnite_Studio
Please investigate the startup failure and advise on the next diagnostic steps.
Please select what you are reporting on:
Unreal Editor for Fortnite
What Type of Bug are you experiencing?
Other
Steps to Reproduce
- Open Epic Games Launcher on Windows 11.
- Navigate to Library.
- Click Launch for Unreal Editor for Fortnite.
- Observe that the status briefly changes to “Running.”
- After a short period, the status returns to “Launch” without the editor opening.
- Repeat after a clean UEFN reinstall; the issue persists.
Expected Result
UEFN should launch successfully from Epic Games Launcher, open the editor window, and allow me to create or open a project.
Observed Result
Epic Games Launcher briefly displays “Running” before returning to “Launch.” The UEFN editor never opens. Launcher logs confirm that the executable starts and then exits. The issue persists after a clean reinstall.
Platform(s)
Windows 11; Intel Core i7-8700; 16 GB RAM; NVIDIA RTX 3050 6 GB. UEFN installed on E: drive. Earlier launch attempts produced a missing tbb12.dll error. Multiple verifications and a fresh installation did not resolve the issue.