Banjo Bridge 6mmx500mm

Error executing template "Designs/Swift/Paragraph/Swift_ProductCustomIframe.cshtml"
System.ArgumentNullException: Value cannot be null.
Parameter name: source
at System.Linq.Enumerable.Count[TSource](IEnumerable`1 source)
at CompiledRazorTemplates.Dynamic.RazorEngine_0f9f6aa674934cd9aaaaee8afc15fc41.Execute() in D:\dynamicweb.net\Solutions\Dynamicweb\hctswift.cloud.dynamicweb-cms.com\files\Templates\Designs\Swift\Paragraph\Swift_ProductCustomIframe.cshtml:line 32
at RazorEngine.Templating.TemplateBase.RazorEngine.Templating.ITemplate.Run(ExecuteContext context, TextWriter reader)
at RazorEngine.Templating.RazorEngineService.RunCompile(ITemplateKey key, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
at RazorEngine.Templating.RazorEngineServiceExtensions.<>c__DisplayClass16_0.<RunCompile>b__0(TextWriter writer)
at RazorEngine.Templating.RazorEngineServiceExtensions.WithWriter(Action`1 withWriter)
at Dynamicweb.Rendering.RazorTemplateRenderingProvider.Render(Template template)
at Dynamicweb.Rendering.TemplateRenderingService.Render(Template template)
at Dynamicweb.Rendering.Template.RenderRazorTemplate()
  1     @inherits Dynamicweb.Rendering.ViewModelTemplate<Dynamicweb.Frontend.ParagraphViewModel>
  2     @using Dynamicweb.Ecommerce.ProductCatalog
  3     @using Dynamicweb.Frontend
  4     @using System.IO
  5  6     @{
  7     	ProductViewModel product = null;
  8     	if (Dynamicweb.Context.Current.Items.Contains("ProductDetails"))
  9     	{
 10     		product = (ProductViewModel)Dynamicweb.Context.Current.Items["ProductDetails"];
 11     	}
 12     	else if (Pageview.Page.Item["DummyProduct"] != null && Pageview.IsVisualEditorMode)
 13     	{
 14     		var pageViewModel = Dynamicweb.Frontend.ContentViewModelFactory.CreatePageInfoViewModel(Pageview.Page);
 15     		ProductListViewModel productList = pageViewModel.Item.GetValue("DummyProduct") != null ? pageViewModel.Item.GetValue("DummyProduct") as ProductListViewModel : new ProductListViewModel();
 16 17     		if (productList?.Products is object)
 18     		{
 19     			product = productList.Products[0];
 20     		}
 21     	}
 22     }
 23 24     @{
 25 26     			FieldValueViewModel customIframe;
 27 28     			product.ProductFields.TryGetValue("CustomIframe", out customIframe);
 29 30     			string customIframeCode = "";
 31 32     			if ((customIframe != null && product.VariantInfo.VariantInfo.Count() < 2) || Model.Item.GetBoolean("ShowForAllProducts") )
 33     			{
 34 35     			customIframeCode = customIframe?.Value != null ? customIframe.Value.ToString() : "";
 36 37     			<div class="custom-iframe">@customIframeCode</div>
 38 39 40     		}
 41     		}
 42