Error executing template "/Designs/Swift/Paragraph/Swift_BreadcrumbNavigation_Custom.cshtml"
System.NullReferenceException: Object reference not set to an instance of an object.
   at Dynamicweb.Content.PageService.GetAncestors(Int32 pageId, Boolean includingSelf)
   at CompiledRazorTemplates.Dynamic.RazorEngine_e0c36314129347e6974c1e5b60531e41.Execute() in C:\inetpub\solutions\Goecker-2022-Prod\Files\Templates\Designs\Swift\Paragraph\Swift_BreadcrumbNavigation_Custom.cshtml:line 22
   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.Frontend.Navigation
  3     @using Dynamicweb.Core
  4     @using Dynamicweb.Ecommerce.ProductCatalog
  5     @using Dynamicweb.Content
  6     @using Dynamicweb.Frontend
  7     @using System
  8     
  9     @* CUSTOMIZED STANDARD SWIFT (v1.15.0) TEMPLATE *@
 10     
 11     @{
 12     	ProductViewModel product = new ProductViewModel();
 13     	if (Dynamicweb.Context.Current.Items.Contains("ProductDetails"))
 14     	{
 15     		product = (ProductViewModel)Dynamicweb.Context.Current.Items["ProductDetails"];
 16     	}
 17     	string contentPageLink = Converter.ToString(Dynamicweb.Ecommerce.Services.ProductGroups.GetGroup(product.PrimaryOrDefaultGroup.Id)?.ProductGroupFieldValues.GetProductGroupFieldValue("ProductContentPage").Value);
 18     	int contentPageId = Converter.ToInt32(contentPageLink.Split('=').Last());
 19     
 20     	if (contentPageId != 0)
 21     	{
 22     		IEnumerable<Dynamicweb.Content.Page> contentPageAncestors = Dynamicweb.Services.Pages.GetAncestors(contentPageId, true);
 23     
 24     		List<Dynamicweb.Content.Page> breadcrumbs = new List<Dynamicweb.Content.Page>();
 25     		for (int i = contentPageAncestors.Count() - 1; i > 0; i--)
 26     		{
 27     			var page = contentPageAncestors.ElementAt(i);
 28     			if (page.ShowInSitemap)
 29     			{
 30     				breadcrumbs.Add(page);
 31     			}
 32     			else
 33     			{
 34     				break;
 35     			}
 36     		}
 37     
 38     		<ol class="breadcrumb small mb-0">
 39     			@foreach (Dynamicweb.Content.Page page in breadcrumbs.Reverse<Dynamicweb.Content.Page>())
 40     			{
 41     				string link = Dynamicweb.Frontend.SearchEngineFriendlyURLs.GetFriendlyUrl("Default.aspx?Id=" + page.ID);
 42     				<li class="breadcrumb-item">
 43     					<a href="@link">@page.MenuText</a>
 44     				</li>
 45     			}
 46     		</ol>
 47     	}
 48     }
 49     
 50     
 51