When attempting to open Studio in a Foundation environment, you receive an "Object reference" error.
Take an Application Trace for Studio, by modifying the AppOptions.xml and changing the value for
If the trace shows an entry stating "System.ServiceModel.FaultException: The server was unable to process the request due to an internal error", this is the key indicator that IIS is in a broken state.
Studio 11.x, Foundation 11.x
IIS hosting the LMS site is in a broken state. It receives the request, but cannot process it.
Perform an IISRESET on the server hosting LMS. If that does not resolve the issue, restart the server.