Powershell Start-Process works but not from .ps1 script - powershell

If I paste this into Powershell blue window it runs fine and launches the program
Start-Process “C:\Program Files (x86)\Engine Pro\engine.exe” -ArgumentList "#21#”;
but if I try to run the same command in a script, run.ps1 script, that launches from a scheduled task in Windows, it does nothing
PowerShell.exe -windowstyle hidden -NoProfile -ExecutionPolicy Bypass C:\run.ps1
Does it have something to do with the -ExecutionPolicy Bypass? Do I have to have an Execution policy in the script as well? I really don't know what that is. I know what -windowstyle hidden is but -NoProfile -ExecutionPolicy Bypass I'm not sure why that is there, just found it on another page, but it's all working except for the program launching from within the script.
Thank you.

& Start-Process "C:\Program Files (x86)\Engine Pro\engine.exe" -ArgumentList "#21#";

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