I have the following code which inserts a button(s) on a page. It works fine for the first set but if another set it added lower down the page there is an error thrown:

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

@inherits UmbracoViewPage

@if (Model.Items.Any()) { foreach (var item in Model.Items) {

        if (item.GetValue("buttonLink") != ""){
        var node = Umbraco.Content(item.GetValue("buttonLink"));

        <section class="socials-block container">
            <div class="btn-holder">
                <a href="@node.Url" class="btn-action"><span>@item.GetValue("buttonText")</span></a>
            </div>
        </section>
        }   
            }   

}