F# ionide websharperserverclient - how to run

I have a problem with running websharperserverclient template app from ionide project generator, and cannot find any information on the web how to do it - the closest thing i got was this question - I actually tried to run it with xsp4 in the project folder (where the Web.config file is) but every time got a 404 (screenshot attached: xsp4 error). Of course before starting xsp i run the ./build.sh (or FAKE build) script and it finishes with no errors. I had no problems with websharpersuave and websharperspa project templates (the second one runs with xsp4 and works like a charm).

EDIT

The error message in text form:

System.Web.HttpException
The resource cannot be found.

Description: HTTP 404.The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly.

Details: Requested URL: /

Exception stack trace:
at System.Web.StaticFileHandler.ProcessRequest (System.Web.HttpContext context) <0x4202aa80 + 0x00733> in <filename unknown>:0
  at System.Web.DefaultHttpHandler.BeginProcessRequest (System.Web.HttpContext context, System.AsyncCallback callback, System.Object state) <0x4202a400 + 0x00153> in <filename unknown>:0
  at System.Web.HttpApplication+<Pipeline>c__Iterator1.MoveNext () <0x42012000 + 0x04416> in <filename unknown>:0
  at System.Web.HttpApplication.Tick () <0x42010800 + 0x00057> in <filename unknown>:0

Yes, there seem to be issues with running the OWIN module with xsp, which I'm investigating. In the meantime, you can switch to using WebSharper's HttpModules by doing the following:

Uncomment the nodes that are indicated as pertaining to the HttpModule in Web.config (namely, the nodes system.web/httpModules and system.webServer/modules).
Remove the NuGet dependencies on WebSharper.Owin and Microsoft.Owin.Host.SystemWeb (and make sure that the corresponding dlls are deleted from your bin folder).
Remove or comment out Startup.fs.