tfs - TFS 2015 へのアップグレード後の TF400898 エラー

Question

TFS Express 2013 を 2015 にアップグレードした後、次のエラーが発生します。

1) tfs 管理ページに移動しようとしたとき

TF400898: An Internal Error Occurred.

2) イベントログ:

Web Request Details
    Url: http://tfs.XXXXXX.com:8080/tfs/defaultcollection/Services/v3.0/LocationService.asmx [method: POST]
    User Agent: Team Foundation (devenv.exe, 14.0.23102.0, Pro, SKU:31)
    Headers: not available
    Path: /tfs/defaultcollection/Services/v3.0/LocationService.asmx
    Local Request: False
    Host Address: 76.XXX.XXX.115
    User: RR2014\sweaver [authentication type: NTLM]

Exception Message: The extension '.svc' is not registered with WCF/WF handler. Please either remove relativeAddress '~/ServiceManagement.svc' in 'system.serviceModel/serviceHostingEnvironment/serviceActivations' from configuration file or register the corresponding extension '.svc' with WCF/WF handler. Please refer to 'http://msdn.microsoft.com/en-us/library/bb515343.aspx' for how to register an extension in IIS. (type ConfigurationErrorsException)
Exception Stack Trace:    at System.ServiceModel.ServiceHostingEnvironment.HostingManager.NormalizedRelativeAddress(String relativeAddress)
   at System.ServiceModel.ServiceHostingEnvironment.HostingManager.LoadConfigParameters()
   at System.ServiceModel.ServiceHostingEnvironment.HostingManager..ctor()
   at System.ServiceModel.ServiceHostingEnvironment.EnsureInitialized()
   at System.ServiceModel.ServiceHostingEnvironment.OnEnsureInitialized(Object state)
   at System.ServiceModel.AspNetPartialTrustHelpers.PartialTrustInvoke(ContextCallback callback, Object state)
   at System.ServiceModel.ServiceHostingEnvironment.SafeEnsureInitialized()
   at System.ServiceModel.Activation.ServiceHttpModule.BeginProcessRequest(Object sender, EventArgs e, AsyncCallback cb, Object extraData)
   at System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

3) Visual Studio 2015 で接続しようとすると:

CData elements not valid at top level of an XML document. Line 1, position 3.

どうすれば修正できますか？