EngineSubsystem Child Class Build Failed UAT

LogWindows: Error: begin: stack for UAT
LogWindows: Error: === Critical error: ===
LogWindows: Error:
LogWindows: Error: Fatal error!
LogWindows: Error:
LogWindows: Error:
LogWindows: Error: end: stack for UAT

i created Manager Class, inheritance EngineSubsystem.
If include that EngineSubsystem code, Github full source Engine build always failed.

but i changed static Uobject Singleton class, build success.

just print ExitCode=25 (Error_UnknownCookFailure)
i saw Log.txt, but can not failed reason anything.

what can i do ?
Anyone have a similar experience?