🎮 Game Error Codes What it means & how to fix it

WUCHANG: Fallen Feathers Fatal Error — 'UE-Project_Plague Game Has Crashed and Will Close'

WUCHANG: Fallen Feathers runs on Unreal Engine 5, and its internal project name is Project_Plague — so its signature crash is the 'UE-Project_Plague Game Has Crashed and Will Close' fatal error, hitting on launch, on the shader-compile screen, or mid-fight. The fix most players miss: a disabled second monitor in Device Manager, and a corrupted Project_Plague folder in %LOCALAPPDATA%. Here is each cause and the fastest fix.

Error codes

'UE-Project_Plague Game Has Crashed and Will Close' (fatal error) Unreal Engine 5 threw a fatal error — Project_Plague is WUCHANG's internal UE project name

Cause: A disabled second monitor, a corrupted Project_Plague save/cache folder, or a bloated/broken NVIDIA shader cache are the confirmed causes on most rigs.

Fix:
  1. If you disabled a second monitor in Device Manager, re-enable it: Device Manager -> Monitors -> right-click the disabled monitor -> Enable device. WUCHANG's UE5 build fatal-errors when a monitor is disabled this way.
  2. Delete the Project_Plague folder in C:\Users\<you>\AppData\Local\ — it re-downloads from Steam Cloud, so you keep your save. This clears the corrupted state behind many UE-Project_Plague crashes.
  3. Clear the NVIDIA shader cache: delete everything in C:\Users\<you>\AppData\Local\NVIDIA\DXCache, then set 'Shader Cache Size' to 10 GB or Unlimited in NVIDIA Control Panel -> Manage 3D settings.
Crash on the 'Compiling Shaders' / startup screen The game dies while building its shader cache on first launch

Cause: Stale GPU driver or corrupted DirectX shader cache.

Fix:
  1. Clean-install the latest GPU driver with DDU (Display Driver Uninstaller), then the newest Nvidia/AMD build.
  2. Clear the DirectX Shader Cache via Disk Cleanup, then relaunch and let WUCHANG rebuild it.
  3. Verify integrity of game files in Steam (Properties -> Installed Files).
Random crash to desktop mid-combat Game vanishes with no error during play

Cause: VRAM/thermal pressure or overlay/antivirus interference.

Fix:
  1. Cap the frame rate and drop textures/shadows one notch to cut VRAM and heat.
  2. Disable Discord/Steam/GeForce overlays and add WUCHANG.exe to antivirus exceptions.
  3. Update the latest Microsoft Visual C++ Redistributables (x86 + x64).

Fixes that work for most WUCHANG: Fallen Feathers (PC / Steam, UE5, internal name Project_Plague) errors

  1. Verify/repair game files in Steam — replaces corrupted files behind most UE5 fatal errors.
  2. Clean-install the latest GPU driver with DDU and install the newest Microsoft Visual C++ Redistributables (x86 + x64) plus the DirectX End-User Runtime.
  3. Clear the DirectX Shader Cache and delete the Project_Plague folder in %LOCALAPPDATA%, then relaunch to rebuild.

FAQ

Is 'UE-Project_Plague' a virus?

No — Project_Plague is simply WUCHANG: Fallen Feathers' internal Unreal Engine 5 project name. The message is UE5's generic fatal-error wrapper, usually caused by a disabled monitor, a corrupted Project_Plague folder, or a broken shader cache.

Will deleting the Project_Plague folder erase my save?

No — the folder re-syncs from Steam Cloud on next launch, so your progress is preserved while the corrupted local state is cleared.

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