Error at Add-Migration CreateIdentitySchema

Error:
...The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
Tutorial
Directions from tutorial
Migrations
The generated Identity database code requires Entity Framework Core Migrations. Create a migration and update the database. For example, run the following commands:
Install-Package Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore
Add-Migration CreateIdentitySchema
Update-Database
Step
Add-Migration CreateIdentitySchema
Subject of error on build
Authentication.Areas.Identity.Pages._ViewImports.cshtml
@using Microsoft.AspNetCore.Identity
@using Authentication.
@using Authentication.
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
Error on build
Build started...
1>------ Build started: Project: Authentication, Configuration: Debug Any CPU ------
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages_ViewImports.cshtml(2,22,2,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages_ViewImports.cshtml(3,22,3,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages\Account_ViewImports.cshtml(1,22,1,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages\Account\Manage_ViewImports.cshtml(1,22,1,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages_ViewImports.cshtml(2,22,2,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages_ViewImports.cshtml(3,22,3,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages\Account_ViewImports.cshtml(1,22,1,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages\Account\Manage_ViewImports.cshtml(1,22,1,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages_ViewImports.cshtml(2,22,2,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages_ViewImports.cshtml(3,22,3,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages\Account_ViewImports.cshtml(1,22,1,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages_ViewImports.cshtml(2,22,2,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages_ViewImports.cshtml(3,22,3,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages_ViewImports.cshtml(2,22,2,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages_ViewImports.cshtml(3,22,3,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages_ViewImports.cshtml(2,22,2,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>C:\Users\User1\Desktop\Tech\Authentication\Authentication\Authentication - Copy\Authentication\Areas\Identity\Pages_ViewImports.cshtml(3,22,3,27): error CS0234: The type or namespace name 'Areas' does not exist in the namespace 'Authentication' (are you missing an assembly reference?)
1>Done building project "Authentication.csproj" -- FAILED.
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
========== Elapsed 00:00.696 ==========