Use a secondary/throwaway Steam account . There is always a risk of account flags when using online fixes. Installation Steps
Launch the game using the main executable (usually Phasmophobia.exe ). phasmophobia-fix-online-v9-3-rar
Locate your phasmophobia-fix-online-v9-3.rar file. Extract its contents using a tool like WinRAR or 7-Zip. Use a secondary/throwaway Steam account