Exception in MainActivity.cs

[jporter-ips]

When running the tutorial an exception is raised in the MaainActivity.cs class.
In this function:
void RegisterServices()
{
ServiceContainer.Register(() => new DatabaseSeedService(ApplicationContext));
}

I get this error:
System.MissingFieldException
Field not found: SimpleInjector.Lifestyle SimpleInjector.Lifestyle.Singleton Due to: Could not find field in class