EditForm requires either a Model parameter, or an EditContext parameter

How does one resolve this Blazor error?

EditForm requires either a Model parameter, or an EditContextparameter

I have created a minimally reproducible example below. The issue seems to be because the model is not instantiated...Why does the following simple page throw this error?

@page "/"<EditForm @Model="@person"><input @bind="@person.FirstName" /><input @bind="@person.LastName" /></EditForm>@code {    public Person person = new Person();    protected override Task OnInitializedAsync()    {        person = new Person        {            FirstName = "Fred",            LastName = "Flintstone"        };        return base.OnInitializedAsync();    }}