My projects cannot be loaded anymore. Solution explorer says it is
(Incompatible)
**Unsupported
This version of Visual Studio is unable to open the following projects. The project types may not be installed or this version of Visual Studio may not support them. For more information on enabling these project types or otherwise migrating your assets, please see the details in the "Migration Report" displayed after clicking OK.**
**Non-functional changes required
Visual Studio will automatically make non-functional changes to the following projects in order to enable them to open in Visual Studio 2015, Visual Studio 2013, Visual Studio 2012, and Visual Studio 2010 SP1. Project behavior will not be impacted.**
The generated HTML in the project directory says
The application which this project type is based on was not found. Please try this link for further information: http://go.microsoft.com/fwlink/?LinkId=628321&projecttype=8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942
and the link is extremely unuseful. The log in appdata says
2219 ERROR SetSite failed for package [Visual C++ Project System Package][Object reference not set to an instance of an object.]:{ at Microsoft.VisualStudio.Project.VisualC.VCProjectEngine.VCProjectEngineShim.<>c__DisplayClass55_0.<b__0>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.Project.VisualC.VCProjectEngine.ApartmentMarshaler.Invoke(Func`1 method) at Microsoft.VisualStudio.Project.VisualC.VCProjectEngine.VCProjectEngineShim.Initialize(IntPtr instResources, Object sp, Object browser, IVCBuildPackageInternal bldPkg)} {F1C25864-3097-11D2-A5C5-00C04F7968B4} 80004003 - E_POINTER VisualStudio 2015/12/03 04:10:01.316 2220 ERROR End package load [Visual C++ Project System Package]
and
616 ERROR SetSite failed for package [Microsoft.VisualStudio.WebClient.Diagnostics.HtmlToolHost.Package.HtmlToolHostPackage, Microsoft.VisualStudio.WebClient.Diagnostics.HtmlToolHost, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a][Expected 1 export(s) with contract name "Microsoft.VisualStudio.WebClient.Diagnostics.HtmlToolHost.Package.Bridge.IWebKitDiagnosticsProvider" but found 0 after applying applicable constraints.]:{ at Microsoft.VisualStudio.Composition.ExportProvider.GetExports(ImportDefinition importDefinition) at Microsoft.VisualStudio.Composition.ExportProvider.GetExports[T,TMetadataView](String contractName, ImportCardinality cardinality) at Microsoft.VisualStudio.Composition.ExportProvider.GetExport[T,TMetadataView](String contractName) at Microsoft.VisualStudio.Composition.ExportProvider.GetExport[T](String contractName) at Microsoft.VisualStudio.Composition.ExportProvider.GetExportT at Microsoft.VisualStudio.Composition.ExportProvider.GetExportedValueT at Microsoft.VisualStudio.ComponentModelHost.ComponentModel.GetServiceT at Microsoft.VisualStudio.WebClient.Diagnostics.HtmlToolHost.Package.HtmlToolHostPackage.OnCreateService(IServiceContainer container, Type serviceType) at Microsoft.VisualStudio.Shell.Package.GetService(Type serviceType) at Microsoft.VisualStudio.WebClient.Diagnostics.HtmlToolHost.Package.HtmlToolHostPackage.GetServiceT at Microsoft.VisualStudio.WebClient.Diagnostics.HtmlToolHost.Package.HtmlToolHostPackage.Initialize() at Microsoft.VisualStudio.Shell.Package.Microsoft.VisualStudio.Shell.Interop.IVsPackage.SetSite(IServiceProvider sp)} {B66F381B-48DE-4C10-B71B-EF9A2A808D85} 80131500 VisualStudio 2015/12/03 03:57:12.693 617 ERROR End package load [Microsoft.VisualStudio.WebClient.Diagnostics.HtmlToolHost.Package.HtmlToolHostPackage, Microsoft.VisualStudio.WebClient.Diagnostics.HtmlToolHost, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]
