Loading a collection in blazor

Question

I'm working in Blazor preview 3.2 attempting to utilize IAsyncEnumerable in my client-side blazor-wasm project. All of my libraries are updated to the latest previews. And my code is posted below. On the server side of things I can walk through it and see it properly returning the specials.

However I see the error below in the browser console. Any help figuring this out would be appreciated.

Error

Client Side Code

protected async override Task OnInitializedAsync()
{
   await LoadSpecials();
}

public async Task<IAsyncEnumerable<Special>> LoadSpecials()
{
    return await HttpClient.GetJsonAsync<IAsyncEnumerable<Special>>("api/specials");
}

Controller

    [HttpGet]
    public async IAsyncEnumerable<Special> Get()
    {
        await foreach (Special special in _db.Specials.Include(o => o.ImageFile).AsAsyncEnumerable())
        {
            await Task.Delay(1000);
            yield return special;
        }
    }