Unable to run a simple webform

Working with Visual Studio Community 2017 and a new Surface Book computer. Testing to create a new Project with ASP .NET Web Application and Empty site. Added a Default.aspx page. When debugging, I got the following error message:

[ArgumentOutOfRangeException: Det angivna argumentet hamnade utanför intervallet med giltiga värden.
Parameternamn: site]
   System.Web.HttpRuntime.HostingInit(HostingEnvironmentFlags hostingFlags, PolicyLevel policyLevel, Exception appDomainCreationException) +280

[HttpException (0x80004005): Det angivna argumentet hamnade utanför intervallet med giltiga värden.
Parameternamn: site]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +10043436
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +95
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +254

I have a project that works fine on the old computer, but not on the new one.

Ingemar