Np. Though you should not put your own files into Windows system folders.

You sir, are the man. This made a lot of sense after reading. I put the DLL, exe, and script inside the System32 folder, added powershell.exe / -File "File name" and it ran beautifully from the Task Scheduler. I was a little too deep and step back to think about this. Thank you!!

This is not really a WinSCP question.
You are trying to run a PowerShell script.
A PowerShell script is executed either using powershell (PowerShell 5 and older) or pwsh (PowerShell 6 and newer) commands. No winscp.exe is involved.
See https://winscp.net/eng/docs/library_powershell#scripting

I have a quick question, I have a working PS1 with .NET assembly that runs just fine when I run it inside the WinSCP Automation folder but does not run in the Task scheduler, I've been trying all the different ways in the forums to run it with no luck, here are some of the attempts:

Attempt1:

Attempt2:

Attempt3:

All failing with the same error code:
2147942401

Could you please help me with the Program/Script and Arguments for this please?

Location Variable: C:\Users\gp-mradmin\Desktop\WinSCP-6.1.2-Automation
PS: TTSI_SFTP_1.ps1