Reports

I have followed your code but I am getting error on OnValidSubmitAsync when the function
await SignInManager.RefreshSignInAsync(user);
is called at the end. I get this error in the console:
fail: Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost[111]
      Unhandled exception in circuit 'yahbi1W7qDkUrcjvWNvKuK3B755old6G346MHD5HLfQ'.
      System.InvalidOperationException: Headers are read-only, response has already started.
         at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpHeaders.ThrowHeadersReadOnlyException()
         at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpResponseHeaders.Microsoft.AspNetCore.Http.IHeaderDictionary.set_SetCookie(StringValues value)
         at Microsoft.AspNetCore.Http.ResponseCookies.Append(String key, String value, CookieOptions options)
         at Microsoft.AspNetCore.Authentication.Cookies.ChunkingCookieManager.AppendResponseCookie(HttpContext context, String key, String value, CookieOptions options)
         at Microsoft.AspNetCore.Authentication.Cookies.CookieAuthenticationHandler.HandleSignInAsync(ClaimsPrincipal user, AuthenticationProperties properties)
         at Microsoft.AspNetCore.Authentication.AuthenticationService.SignInAsync(HttpContext context, String scheme, ClaimsPrincipal principal, AuthenticationProperties properties)
         at Microsoft.AspNetCore.Identity.SignInManager`1.SignInWithClaimsAsync(TUser user, AuthenticationProperties authenticationProperties, IEnumerable`1 additionalClaims)
         at Microsoft.AspNetCore.Identity.SignInManager`1.RefreshSignInAsync(TUser user)
         at BlazorApp1.Components.Account.Pages.Manage.Index.OnValidSubmitAsync() in C:\Users\aamir\source\repos\BlazorApp1\BlazorApp1\Components\Account\Pages\Manage\Index.razor:line 149
         at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
         at Microsoft.AspNetCore.Components.Forms.EditForm.HandleSubmitAsync()
         at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
         at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)
dbug: Microsoft.AspNetCore.SignalR.HubConnectionHandler[6]
      OnConnectedAsync ending.
79774325
