Search Configuration XML import using SharePoint App

Question

I'm trying to import a search configuration XML using a SharePoint App.
I have check the following:
 - The XML is correct. I can upload it manually.
 - The code works using a console app, but not using the SharePoint app.
Following code:
SearchConfigurationPortability searchConfig = new SearchConfigurationPortability(this.Context);
SearchObjectOwner owner = new SearchObjectOwner(this.Context, SearchObjectLevel.SPWeb);
searchConfig.ImportSearchConfiguration(owner, configurationLocation);
this.Context.Load(searchConfig);
this.Context.ExecuteQuery();
Following error message:
    ServerException was caught
    The server was unable to process the request due to an internal error.
    For more information about the error, either turn on IncludeExceptionDetailInFaults
    (either from ServiceBehaviorAttribute or from the <serviceDebug> configuration behavior)
    on the server in order to send the exception information back to the client, or turn on
    tracing as per the Microsoft .NET Framework SDK documentation and inspect the server
    trace logs.
Thanks!

Answer 1

I'm deploying the app to a SharePoint dev environment in the cloud so I can't see the ULS Logs, unfortunately. The link you suggested states that "managed properties aren’t supported in this deployment model" and this is exactly what I'm trying to provision.
Any other ideas why the above code fails, although stated exactly on http://msdn.microsoft.com/en-us/library/office/dn205276(v=office.15).aspx?