That should be sufficient.
That's great :)
Check the browser console.
Rename XMLHttpRequestHelper.ts to XmlHttpRequestHelper.ts.
Are you using TimeZoneConverter 2.4.1 or above ?
How would I know that?
Check the NuGet packages in .Core project.
Check the url in angular/nswag/service.config.nswag.
Specify /runtime:NetCore20.
Show the stack trace.
refresh.bat:
"..\node_modules\.bin\nswag" run