CrossMedia TakePhotoAsync is always returning null

I had this working at one point but unable to get to a working state again.

My below code is always returning null and for the life of me I can't figure out why.

    using System;
    using Xamarin.Forms;
    using Xamarin.Forms.Xaml;
    using Plugin.Media;

    private async void UploadPhoto_Clicked(object sender, EventArgs e)
    {
        await CrossMedia.Current.Initialize();

        var file = await CrossMedia.Current.PickPhotoAsync(new Plugin.Media.Abstractions.PickMediaOptions
        {
            CompressionQuality = 50,
            PhotoSize = Plugin.Media.Abstractions.PhotoSize.Large
        });

        if (file == null)
            return;

        db.uploadBlob(System.IO.Path.GetFileName(file.Path), (System.IO.FileStream)file.GetStream(), "photos");

        await DisplayAlert("Success", "Photo Uploaded :-)", "OK");
    }

I have added the below into my MainActivity

    public override void OnRequestPermissionsResult(int requestCode, string[] permissions, Permission[] grantResults)
    {
        PermissionsImplementation.Current.OnRequestPermissionsResult(requestCode, permissions, grantResults);
    }

This is also happening for the other CrossMedia calls such as PickPhotoAsync, TakeVideoAsync and PickVideoAsync. I have Version 2.6.2 of Plugin.Media installed.

Thanks in Advance
Luke