Невозможно создать DbContext типа NULL. Исключение «Ссылка на объект не установлена ​​на экземпляр объекта»

У меня проблема с добавлением миграции для моей базы данных в ASP.NET Core 8.0.

Вот код

ПриложениеDbContext:

    public ApplicationDbContext(DbContextOptions<DbContext> options) : base(options)
    {
    }
    public DbSet<Single1> Singles { get; set; }
    public DbSet<Department> Departments { get; set; }
    public DbSet<Person> Persons { get; set; }
    public DbSet<Day> Days { get; set; }
    public DbSet<Month> Months { get; set; }
    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Single1>().HasData(
            new Single1 { SetId = 1, UserId = 1, SubcriptionDate = new DateTime(2020, 12, 12), Set1 = 1, Set2 = 0, Set3 = 1 }
            );
        modelBuilder.Entity<Department>().HasData(
            new Department { DepartmentId = 1, DepartmentName = "IT", PersonalIds = { 1 } }
            );
        modelBuilder.Entity<Person>().HasData(
            new Person { Name = "Trung", PersonalId = 1, Set1 = 1, Set2 = 1, Set3 = 1 }
            );
        modelBuilder.Entity<Day>().HasData(
            new Day { DayId= 1, Date = new DateTime(2020, 12, 12), DepartmentId = 1 }
            );
        modelBuilder.Entity<Month>().HasData(
            new Month { MonthId = 1, Month1 = new DateTime(2020, 12, 12), DepartmentId = 1 }
            );
    }
}

День.cs:

public class Day
{
    [Key]
    [Required]
    public int DayId { get; set; }
    [DataType(DataType.Date)]
    [DisplayFormat(DataFormatString  = "{0:DD/MM/yyyy}",ApplyFormatInEditMode = true)]
    public DateTime Date { get; set; }
    [Required]
    public int DepartmentId { get; set; }
    [ForeignKey("DepartmentId")]
    public Department Department { get; set; }

}

Месяц.cs:

public class Month
{
    [Key]
    public int MonthId {  get; set; }
    [DisplayFormat(DataFormatString = "{0:MM/yyyy}", ApplyFormatInEditMode = true)]
    public DateTime Month1 { get; set; }
    public int DepartmentId { get; set; }
    [ForeignKey("DepartmentId")]
    public Department Department { get; set; }
}

Человек.cs:

public class Person
{
    [Key]
    public int PersonalId { get; set; }
    public string Name {  get; set; }
    [DefaultValue(0)]
    public int Set1 { get; set; }
    [DefaultValue(0)]
    public int Set2 { get; set; }
    [DefaultValue(0)]
    public int Set3 { get; set; }
}

Отдел.cs:

public class Department
{
    [Key]
    public int DepartmentId { get; set; }
    [Required]
    public virtual List<int> PersonalIds { get; set; }
    [ForeignKey("PersonalId")]
    public virtual List<Person> Persons { get; set; }
    public string? DepartmentName { get; set; }
}

Одиночный.cs:

public class Single1
{
    [Key]
    public int SetId { get; set; }
    [Required]
    public int UserId { get; set; }
    [Required]
    [DisplayFormat(DataFormatString = "{0:DD/MM/yyyy}", ApplyFormatInEditMode = true)]
    public DateTime SubcriptionDate { get; set; }
    [Range(0, 10, ErrorMessage  = "Chỉ có tối đa 10 xuất cho 1 người")]
    [DefaultValue(0)]
    public int Set1 { get; set; }
    [Range(0, 10, ErrorMessage = "Chỉ có tối đa 10 xuất cho 1 người")]
    [DefaultValue(0)]
    public int Set2 { get; set; }
    [Range(0, 10, ErrorMessage = "Chỉ có tối đa 10 xuất cho 1 người")]
    [DefaultValue(0)]
    public int Set3 { get; set; }
}

appsettings.json:

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "AllowedHosts": "*",
  "ConnectionStrings": {
    "DefaultConnection": "Server=Admin;Database=BTAnCaRedo;Trusted_Connection=True;TrustServerCertificate=True"
  }
}

программа.cs:

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllersWithViews();
builder.Services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection")));
builder.Services.AddRazorPages();
builder.Services.AddScoped(typeof(IRepository<>), typeof(Repository<>));
builder.Services.AddTransient<IUnitOfWork, UnitOfWork>();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.MapControllerRoute(
name: "default",
    pattern: "{area=User}/{controller=Home}/{action=Index}/{id?}");

app.Run();

Я пробую все, что доступно сразу в Google и видео на Youtube, но все равно не могу это исправить. Ошибка в заголовке выскакивает снова и снова. Проект по умолчанию также верен, поэтому я не вижу, в чем проблема.