Identity scaffolding failed in VS 2019 when updating the package to v3.0.0-preview5-19264-04

While I add the new scaffold item for the fresh my ASP-NET Core 3 Web-Api project for the first time, it worked perfectly. But, I found the scaffold-generator making several folders on my project and all identity data was placed in the area folder. For some reason, I want to re-scaffold new one and try other costumes in the parameters. Before I try again using the scaffold-generator, I delete all the files and folders added by the previous scaffold-generator and update some packages by Nuget Package Manager, this time an error appears as below.

Error message on console

Finding the generator 'identity'...
Running the generator 'identity'...
There was an error running the template C:\Users\yuant\.nuget\packages\microsoft.visualstudio.web.codegenerators.mvc\3.0.0-preview5-19264-04\Templates\Identity\Pages\_Layout.cshtml: Template Processing Failed:(95,13): error CS0103: The name 'BeginWriteAttribute' does not exist in the current context
(96,13): error CS0103: The name 'EndWriteAttribute' does not exist in the current context
   at Microsoft.VisualStudio.Web.CodeGeneration.ActionInvoker.<BuildCommandLine>b__6_0()
   at Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args)
   at Microsoft.VisualStudio.Web.CodeGeneration.ActionInvoker.Execute(String[] args)
   at Microsoft.VisualStudio.Web.CodeGeneration.CodeGenCommand.Execute(String[] args)

Error message on IDE

my.csproj

<Project Sdk="Microsoft.NET.Sdk.Web">

<PropertyGroup>
    <TargetFramework>netcoreapp3.0</TargetFramework>
    <LangVersion>8.0</LangVersion>
  </PropertyGroup>

<ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="3.0.0-preview5-19227-01" />
    <PackageReference Include="Microsoft.AspNetCore.Identity.UI" Version="3.0.0-preview5-19227-01" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.0.0-preview5-19227-01" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.0.0-preview5.19227.1" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer.NetTopologySuite" Version="3.0.0-preview5.19227.1" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.0.0-preview5.19227.1">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="3.0.0-preview5.19227.9" />
    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.0.0-preview5-19264-04" />
  </ItemGroup>

</Project>

Is the error message like above caused by a package update or something else? Can I get clues to resolve this problem. TY

Microsoft Visual Studio 2019 16.0.4 Microsoft Windows 10

[seancpeters]

The 3.0.0 release will have a fix for this issue, and is coming relatively soon We may release another preview prior to that, but uncertain at this point.

[lailaDev]

I have the same problem when i try to generate ‘new scaffold item’ for the first time for a ‘react’ project , with latest version of visual studio 2019 (16.2.0 Preview 1.0) and .net core SDK. in attachement my .csproj file Csproj.txt