Summary
UEFN crashes at 40% initialization with EXCEPTION_ACCESS_VIOLATION after the latest update. Tried full reinstall, deleting config folders (Saved, Intermediate, AppData, ProgramData), launching as admin from .exe, GPU driver reinstall/rollback, and verified system integrity (no GPU or RAM issues). Issue started after the June/July 2025 update. Previously worked fine for over a year on the same system.
Please select what you are reporting on:
Unreal Editor for Fortnite
What Type of Bug are you experiencing?
Stability
Steps to Reproduce
- Open UEFN via Epic Games Launcher or directly from the installation folder.
- Wait during startup — observe the progress bar.
- UEFN reaches 40% initialization and then crashes.
Expected Result
UEFN should fully initialize and launch the editor without crashing.
Observed Result
UEFN crashes during startup at 40% initialization with an “Unhandled Exception: EXCEPTION_ACCESS_VIOLATION” error. The crash reporter appears with no way to proceed.
Platform(s)
Windows 11 (64-bit)
