UE 5.1 C++ project windows build does not start

Development Platform & Builds
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1

Build shows exception code 0x80000003 in Windows Event Viewer (snapshot attached)

windowserror report
windowserror report696×538 21.9 KB

in VS debug shows break point in an ability file

Debug error
Debug error2234×1032 212 KB

2

Solved it. The root cause was the global/static initialization. It was executing during Unreal’s module/class initialization, before the Gameplay Tags system was ready, causing the 0x80000003 crash.

The Fix:

  • Removed the unsafe global initialization.
  • Converted the cooldown tags to safe runtime/function-local initialization.