Is anyone getting empty responses from the PMP ReST API when fetching data

Is anyone getting empty responses from the PMP ReST API when fetching data

PMP Enterprise Build 
We're trying to use the ReST API to generate passwords, add resources & accounts, and to fetch those resources, accounts, and passwords.
I got the password generator working fine.

I cannot get any of the other API calls to produce results. I get HTTP Response status 200, but empty results when I try to do these actions:
-Get a Resource ID by Resource Name (API doc example 8)
-Create a Resource (API doc example 6)
-Create a Resource with an account (API doc example 6)

This happens with Google's ARC app and PowerShell(v5.1).
API User is an Administrator.

I am encoding URL data appropriately.
The API User Auth Token is in the header of the request.

This is baffling. Anyone else experienced this?
If so, how did you remedy it?