Here is some information about an issue regarding Orchard and Magelia.
I installed Magelia WebStore on an instance of Windows Server 2012, and had some difficulties interfacing the Services with the
Magelia Module for Orchard. In fact, there was something missing in my server Features. With the help of the Magelia team, I activated HTTP Activation in ".NET Framework 4.5 Features > WCF Services"
and then everything worked just fine.