The RestIntegration sample cannot be run

[ZedZipDev]

I try to see the Michael's video and run the corresponding example.
When I run the example (in VS2022) I have:

info: Microsoft.Hosting.Lifetime[14]
      Now listening on: https://localhost:20477/
info: Microsoft.Hosting.Lifetime[14]
      Now listening on: http://localhost:20478/
info: Microsoft.Hosting.Lifetime[0]
      Application started. Press Ctrl+C to shut down.
info: Microsoft.Hosting.Lifetime[0]
      Hosting environment: Development
info: Microsoft.Hosting.Lifetime[0]
      Content root path: D:\MyProjects4\GraphQL\hotchocolate-examples-master\misc\RestIntegration\GraphQLService\
fail: Microsoft.Extensions.Hosting.Internal.Host[9]
      BackgroundService failed
      HotChocolate.SchemaException: For more details look at the `Errors` property.
      1. Unable to resolve dependencies None: variable, None: http for type `Book`. (HotChocolate.Types.ObjectTypeExtension)
      2. Unable to resolve dependencies None: variable, None: http for type `Book`. (HotChocolate.Types.ObjectType<RestIntegration.Book>)
         at HotChocolate.Configuration.TypeInitializer.EnsureNoErrors()
         at HotChocolate.Configuration.TypeInitializer.CompleteTypes()
         at HotChocolate.Configuration.TypeInitializer.Initialize()
         at HotChocolate.SchemaBuilder.Setup.InitializeTypes(SchemaBuilder builder, IDescriptorContext context, IReadOnlyList`1 types)
         at HotChocolate.SchemaBuilder.Setup.Create(SchemaBuilder builder, LazySchema lazySchema, IDescriptorContext context)
         at HotChocolate.Execution.RequestExecutorResolver.CreateSchemaAsync(String schemaName, RequestExecutorSetup options, RequestExecutorOptions executorOptions, IServiceProvider serviceProvider, TypeModuleChangeMonitor typeModuleChangeMonitor, CancellationToken cancellationToken)
         at HotChocolate.Execution.RequestExecutorResolver.CreateSchemaServicesAsync(String schemaName, RequestExecutorSetup options, CancellationToken cancellationToken)
         at HotChocolate.Execution.RequestExecutorResolver.GetRequestExecutorNoLockAsync(String schemaName, CancellationToken cancellationToken)
         at HotChocolate.Execution.RequestExecutorResolver.GetRequestExecutorAsync(String schemaName, CancellationToken cancellationToken)
         at HotChocolate.AspNetCore.Warmup.ExecutorWarmupService.ExecuteAsync(CancellationToken stoppingToken)
         at Microsoft.Extensions.Hosting.Internal.Host.TryExecuteBackgroundServiceAsync(BackgroundService backgroundService)

Where am I wrong? How to run the example?