With Razor enabled and missing ending slash - Error!

I just added Razor

        Plugins.Add(new RazorFormat());

When i goto metadata page

i see the error below. if I add the trailing slash everything works?

Error CodeIndexOutOfRangeExceptionMessageIndex was outside the bounds of the array.Stack Trace[Object: 6/29/2018 9:36:57 PM]: [REQUEST: ] System.IndexOutOfRangeException: Index was outside the bounds of the array. at ServiceStack.Razor.Managers.RazorViewManager.GetDictionaryPagePath(String relativePath) at ServiceStack.Razor.Managers.RazorViewManager.GetPage(String absolutePath) at ServiceStack.Razor.Managers.RazorViewManager.GetContentPage(String pathInfo) at ServiceStack.Razor.Managers.RazorPageResolver.ResolveContentPage(IRequest httpReq) at ServiceStack.Razor.Managers.RazorPageResolver.ProcessRequestAsync(IRequest httpReq, Object dto, Stream outputStream) at ServiceStack.Formats.HtmlFormat.d__10.MoveNext()

What do you mean by /metadata page? What exactly is /appname a Route/Service, Directory or file like appname.cshtml?