Problem

In SQL Server Management Studio 2014 (I found the error to happen on editions up to CU5. When you use the Registered Servers tab and try and evaluate a policy you get the below error

Value cannot be null.

Parameter name: source (System.Core)

PBM and CMS Error 02PBM and CMS Error 01

Solution

Ive tried multiple suggestions online (messing with temp folders, changing CU, nothing worked. The only solution i did find that worked is install SSMS 2016, I’ve been holding off on putting that on my workstations as RedGate SQL Prompt wasnt working with it last time i tried, but this has now been resolved as well!

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