"Warning: GEditor isn't valid! Particle reset commands will not work for Niagara components!" when QA-PostProcessing is opened with -game

The following warning will be present when running QAGame QA-PostProcessing with -game:

LogNiagaraEditor: Warning: GEditor isn't valid! Particle reset commands will not work for Niagara components!

This does not reproduce if running standalone game in the play dropdown in the editor and only writes when the project is loading with -game.

This occurs in Main CL 9475332, but does not occur in Release-4.23 CL 9470664

1. Sync and Compile QAGame
2. Run UE4Editor.exe QAGame QA-PostProcessing -game -log
3. Refer to the output log for warnings

Results: There will be a LogNiagaraEditor warning present in the output log when the project is run as a standalone game outside of the editor.

Expected: No Niagara related warnings are present in the log.

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