Ok so what's happening is IIS is attempting to serve this up without passing it off to appropriate processing engines. In other words it doesn't recognize this page as a SVC. I'm not sure of the exact root cause but it has something to do with this graph...
Inbound SVC request---> IIS (asks is this something I know?)---> Yes it's a SVC request...
---> Pass off SVC request to appropriate processing engine ---> Engine does it's thing.
<---Response from IIS <----Engine finishes it's stuff
It is either a config issue or uninstalled component within IIS.
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