I have a Partial View which renders a Feature Box on my homepage. These feature boxes are selected via a MNTP on my homepage doctype.

I'm trying to get the image to display via Image Cropper but keep getting this error.

The value of parameter 'id' must be either a string or an integer

My Partial View code is

@inherits Umbraco.Web.Mvc.UmbracoTemplatePage


@*
    This snippet lists the items from a Multinode tree picker, using the pickers default settings.
    Content Values stored as xml.

    To get it working with any site's data structure, set the selection equal to the property which has the
    multinode treepicker (so: replace "PropertyWithPicker" with the alias of your property).
*@

@{ var selection = CurrentPage.FeaturesToHighlight; }

<div class="feature-boxes">
    <div class="row no-gutter">

        @foreach(var item in selection)
        {           
            <div class="col-sm-4">
                <div class="feature-box">
                    <a href="@item.Link.Url">
                    @{
                        if (item.HasValue("image")) {
                            var featureImage = Umbraco.Media(item.Image);

                            <img src="@featureImage.GetCropUrl("featureBox")" alt="" class="img-responsive" />
                        }
                    }
                        <h2>@item.Heading</h2>
                        <p>@item.SubHeading</p>
                    </a>
                </div>
            </div>
        }
    </div>
</div>

Some Background Info

• I've been following along with Jeavon's example in uHangout Ep30.
• Have changed my Image Media Type from Upload to Image Cropper.
• Have set a crop called 'featureBox'
• My media picker alias on my feature box doctype is 'image'

Can anyone help?