You can configure the SSH server to give clients a customized environment, including a custom PATH variable. You will need to configure 2 things:
Create the file ~/.ssh/environment on the server containing the following:
Change the SSH server config file /private/etc/ssh/sshd_config to ...
Did you run PowerShell as Administrator?
Start Menu → Search: powershell → Right-click Windows PowerShell → Run as administrator
To elevate Powershell to an Administrator terminal, execute:
Start-Process powershell -Verb runas