Citrix Desktop Studio: Found invalid data while decoding

We just added another Citrix Desktop Deleivery Controller (DDC) 5.6 FP1 to our farm.   But when launching Desktop Studio on the new server and viewing HDX policy was blank and a refresh threw the following error:

The "Found invalid data while decoding" tipped me off that it couldn't read or render the polices from the database.  Low and behold we didn't have the same or latest Citrix Group Policy Management installed on the new DDC. So just closed Desktop Studio, installed them, and re-opened Desktop Studio and there they were. 

Citrix outlines it in in CTX1314601 for XenApp but applies to XenDesktop as well.  Citrix Group Policy Management comes with the latest XD install media as well.