PowerShell script template for API Get website/websites

Going off the examples on LogicMonitors website your script looks correct to me.   I am also having issues using their examples successfully.   I have a current open ticket with them.  

Like you the same script with "/device/devices" works for me however "/website/websites" does not work.   I got a 404 error.  

Where did you find to use x-version 3 in postman?  Not sure I have found the documentation on when to use what X-Version.