Your official information source from the .NET Web Development and Tools group at Microsoft.
Unfortunately after installing ASP.NET and Web Tools Preview Refresh for Visual Studio 2013 Preview, creating SPA VB template will fail.
This post describes how to fix this issue.
I authored these two scripts (one for x86 and x64) to fix the issue.
If for some reason you can’t run the scripts, you can fix the issue by altering template files.