Add image to identity profile in Blazor on .NET 8

I am using Microsoft Visual Studio Community 2022 (64-bit) v17.14.16. I have followed your code but I am getting error in OnValidSubmitAsync when the function

 private async Task OnValidSubmitAsync()
 {
     var firstName = user.FirstName;
     var lastName = user.LastName;

     if (Input.FirstName != firstName)
     {
         user.FirstName = Input.FirstName;
         await UserManager.UpdateAsync(user);
     }

     if (Input.LastName != lastName)
     {
         user.LastName = Input.LastName;
         await UserManager.UpdateAsync(user);
     }

     if (Input.ProfilePicture != null && Input.ProfilePicture.Length > 0)
     {
         user.ProfilePicture = Input.ProfilePicture;
         await UserManager.UpdateAsync(user);
     }

     if (Input.PhoneNumber != phoneNumber)
     {
         var setPhoneResult = await UserManager.SetPhoneNumberAsync(user, Input.PhoneNumber);

         if (!setPhoneResult.Succeeded)
         {
             RedirectManager.RedirectToCurrentPageWithStatus("Error: Failed to set phone number.", HttpContext);
         }
     }

     await SignInManager.RefreshSignInAsync(user);

     RedirectManager.RedirectToCurrentPageWithStatus("Your profile has been updated", HttpContext);
}

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.

I tried to save first name, last name and profile picture in the class ApplicationUser derived from IdentityUser. The data is saving after following the code but getting error message on a function. On page reload from browser the error message disappears and the data is loaded correctly.