InvalidOperationException: The SPA default page middleware could not return the default page '/index.html' because it was not found, and no other middleware handled the request.

[andrijac]

Hi,

I'm trying out sample UnoWCTDataGridSample. I'm trying to run WCTTestbed2.Wasm. When I run the sample, I get an error:

InvalidOperationException: The SPA default page middleware could not return the default page '/index.html' because it was not found, and no other middleware handled the request.
Microsoft.AspNetCore.SpaServices.SpaDefaultPageMiddleware+<>c__DisplayClass0_0.<Attach>b__1(HttpContext context, Func<Task> next)
Microsoft.AspNetCore.Builder.UseExtensions+<>c__DisplayClass0_1.<Use>b__1(HttpContext context)
Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware.TryServeStaticFile(HttpContext context, string contentType, PathString subPath)
Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Builder.UseExtensions+<>c__DisplayClass0_2.<Use>b__2()
Microsoft.AspNetCore.SpaServices.SpaDefaultPageMiddleware+<>c__DisplayClass0_0.<Attach>b__0(HttpContext context, Func<Task> next)
Microsoft.AspNetCore.Builder.UseExtensions+<>c__DisplayClass0_1.<Use>b__1(HttpContext context)
Microsoft.AspNetCore.Builder.Extensions.MapWhenMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Builder.RouterMiddleware.Invoke(HttpContext httpContext)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

[jeromelaban]

Thanks for the report. This is generally caused by a prior build issue. Close IIS Express explicitly (in the task bar) and rebuild the project.

[andrijac]

It worked now, sorry to bother you :)

[jeromelaban]

No worries at all, it's something we know needs to be fixed, but haven't implemented a good solution yet. Thanks for reporting it!