IAW Cisco Meeting Server Cisco Meeting Server Release 2.4 and later API Reference Guide April 24, 2019

Section 6.8.5 (page 57) Retrieving the bulk sync operations GET method on "/coSpaceBulkSyncs " node.

Response is structured as a top-level tag with potentially multiple elements within it.

However the response for the service is:

The issue is the S in Space is not capitalized in the XML message that is returned.
Thus the framework can not map this to the expected token since it uses a case sensitive string match.

So if you follow the guidance of the documentation then the message can not be consumed.