VS2013 Error Message

An exception was encountered while constructing the content of this frame.  This information is also logged in "C:\Users\Philip\AppData\Roaming\Microsoft\VisualStudio\12.0\ActivityLog.xml".

Exception details:
System.ComponentModel.Composition.ImportCardinalityMismatchException: No exports were found that match the constraint:
	ContractName	Microsoft.VisualStudio.Shell.IVsHierarchyItemManager
	RequiredTypeIdentity	Microsoft.VisualStudio.Shell.IVsHierarchyItemManager
   at System.ComponentModel.Composition.Hosting.ExportProvider.GetExports(ImportDefinition definition, AtomicComposition atomicComposition)
   at System.ComponentModel.Composition.Hosting.ExportProvider.GetExportsCore(Type type, Type metadataViewType, String contractName, ImportCardinality cardinality)
   at System.ComponentModel.Composition.Hosting.ExportProvider.GetExportedValueCore[T](String contractName, ImportCardinality cardinality)
   at System.ComponentModel.Composition.Hosting.ExportProvider.GetExportedValue[T](String contractName)
   at System.ComponentModel.Composition.Hosting.ExportProvider.GetExportedValue[T]()
   at Microsoft.VisualStudio.ComponentModelHost.ComponentModel.GetService[T]()
   at Microsoft.VisualStudio.PlatformUI.HierarchyNavigatorPaneBase`1.get_HierarchyItemManager()
   at Microsoft.VisualStudio.PlatformUI.SolutionNavigatorPane.InitializeHierarchyItemManagerEvents()
   at Microsoft.VisualStudio.PlatformUI.SolutionNavigatorPane.RefillNavigator()
   at Microsoft.VisualStudio.PlatformUI.SolutionNavigatorPane.OnToolWindowCreated()
   at Microsoft.VisualStudio.Shell.Package.CreateToolWindow(Type toolWindowType, Int32 id, ProvideToolWindowAttribute tool)
   at Microsoft.VisualStudio.Shell.Package.FindToolWindow(Type toolWindowType, Int32 id, Boolean create, ProvideToolWindowAttribute tool)
   at Microsoft.VisualStudio.Shell.Package.Microsoft.VisualStudio.Shell.Interop.IVsToolWindowFactory.CreateToolWindow(Guid& toolWindowType, UInt32 id)
   at Microsoft.VisualStudio.Platform.WindowManagement.WindowFrame.ConstructContent()