Validate the guide is the issue.

http://127.0.0.1:8866/guide2.aspx

[HttpException (0x80004005): The current identity (NT AUTHORITY\SYSTEM) does not have write access to 'C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files'.]
   System.Web.HttpRuntime.SetUpCodegenDirectory(CompilationSection compilationSection) +711
   System.Web.HttpRuntime.HostingInit(HostingEnvironmentFlags hostingFlags, PolicyLevel policyLevel, Exception appDomainCreationException) +231

[HttpException (0x80004005): The current identity (NT AUTHORITY\SYSTEM) does not have write access to 'C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files'.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +660
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +95
   System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +449

Just create the directory “Temporary ASP.NET Files” and grant SYSTEM access.