Need help running a script before launching Hitman 3 (EGS)

I tried running this script:
@echo off
Start "" ".\Start Server.cmd"
Start "" ".\PeacockPatcher.exe"

Pretty simple. It works when launched manually, opens the two things I want etc. But when I select the .bat file containing the scrips under "Select a script to run before the game is launched" in Heroic the game just doesn't start anymore. the programs don't open and Heroic still tells me the game is launching. Do I have to rewrite it? Does it somehow break cause Heroic tries to run it somewhere else?
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