Exception in template (Designs\eCommerce\Paragraph\AddToCart.cshtml): System.NullReferenceException: Object reference not set to an instance of an object.
   at CompiledRazorTemplates.Dynamic.aebedbcbdacfcc.Execute()
   at RazorEngine.Templating.TemplateBase.RazorEngine.Templating.ITemplate.Run(ExecuteContext context)
   at RazorEngine.Razor.Parse[T](String razorTemplate, T model, String cacheName)
   at Dynamicweb.Rendering.Template.Output()
@using System
@using System.Web;
@using Dynamicweb.Modules.UserManagement;


@{
    var user = User.GetCurrentUser();
    var sessionId = HttpContext.Current.Request.QueryString["SessionId"];
    var productId = HttpContext.Current.Request.QueryString["DWProductId"];
    var modelNumber = Dynamicweb.eCommerce.Products.Product.GetProductByID(productId).Number;
    var price = HttpContext.Current.Request.QueryString["price"];
    var configurationName = HttpContext.Current.Request.QueryString["ConfigurationName"];
    var addToCartQuery = HttpContext.Current.Request.QueryString["AddTocart"];
    var referrer = HttpContext.Current.Request.QueryString["Referrer"];
    var salesGroup = Pageview.Area.Item["Sales_Rep_Group"];

    var userIsSalesRep = user != null && user.GroupIDs.Contains(Convert.ToInt32(salesGroup.ToString()));
    var cartIdKey = userIsSalesRep ? "Sales_View_Cart_Page_ID" : "Show_Cart_Page_ID";
    var cartId = Convert.ToInt32(Pageview.Area.Item[cartIdKey]);
    var addToCart = !string.IsNullOrEmpty(addToCartQuery) && Convert.ToBoolean(addToCartQuery);

    if (addToCart)
    {
        <div class="move-top" style="display:grid">
            <div style="margin-top:95px"></div>

            <h2>Adding product to cart, please wait</h2>
            <form method="post" name="autoAddToCart" style="display: none;">
                <input type="hidden" name="CartCmd" value="add" />
                <input type="hidden" name="ProductLink" value="@referrer" />
                <input type="hidden" name="Redirect" value="/Default.aspx?ID=@cartId" />
                <input type="hidden" name="ProductID" value="@productId" />
                <input type="hidden" name="ConfigurationName" value="@configurationName" />
                <input type="hidden" name="Quantity" value="1" />
                <input id="EcomOrderLineFieldInput_GuruSessionId" type="hidden" name="EcomOrderLineFieldInput_GuruSessionId" value="@sessionId" />
                <input id="EcomOrderLineFieldInput_ConfigurationName" type="hidden" name="EcomOrderLineFieldInput_ConfigurationName" value="@configurationName" />
                <input id="Submit1" type="submit" value="Add to cart" />
            </form>
            <script src="https://p5w7e8h7.stackpathcdn.com/Files/Templates/Designs/eCommerce/assets/javascripts/ga4.js"></script>
            <script>
                eCommerce.Overlay.show(document.body);
                pushAddToCart("@price", "@userIsSalesRep", "@modelNumber", "@configurationName");
                document.forms['autoAddToCart'].submit();
            </script>
        </div>
        
    }
}