Error executing template "Designs/Swift/Paragraph/Swift_Accordion.cshtml"
System.NullReferenceException: Object reference not set to an instance of an object.
   at CompiledRazorTemplates.Dynamic.RazorEngine_5e15069c79d44a6c948bd824307aee99.ExecuteAsync()
   at RazorEngine.Templating.TemplateBase.Run(ExecuteContext context, TextWriter reader)
   at RazorEngine.Templating.RazorEngineCore.RunTemplate(ICompiledTemplate template, TextWriter writer, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineService.Run(ITemplateKey key, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.DynamicWrapperService.Run(ITemplateKey key, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineServiceExtensions.Run(IRazorEngineService service, String name, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineServiceExtensions.<>c__DisplayClass23_0.<Run>b__0(TextWriter writer)
   at RazorEngine.Templating.RazorEngineServiceExtensions.WithWriter(Action`1 withWriter)
   at RazorEngine.Templating.RazorEngineServiceExtensions.Run(IRazorEngineService service, String name, Type modelType, Object model, DynamicViewBag viewBag)
   at Dynamicweb.Rendering.RazorTemplateRenderingProvider.Render(Template template) in /_/src/Application/Providers/Dynamicweb.Rendering.Providers.NetCore/Razor/RazorTemplateRenderingProvider.cs:line 99
   at Dynamicweb.Rendering.TemplateRenderingService.Render(Template template) in E:\A10\_w\2\s\src\Core\Dynamicweb.Core\Rendering\TemplateRenderingService.cs:line 21
   at Dynamicweb.Rendering.Template.RenderRazorTemplate() in E:\A10\_w\2\s\src\Core\Dynamicweb.Core\Rendering\Template.cs:line 749


  1     @inherits Dynamicweb.Rendering.ViewModelTemplate<Dynamicweb.Frontend.ParagraphViewModel>
  2     
  3     @functions 
  4     {
  5     	private string RenderCustomCSS(IEnumerable<string> decorations)
  6     	{
  7     		var cssClasses = new List<string>();
  8     
  9     		foreach (var itemId in decorations)
 10     		{
 11     			var item = Dynamicweb.Content.Services.Items.GetItem("Swift_Css", itemId);
 12     			item.TryGetValue("Class", out object classes);
 13     
 14     			if (classes is null)
 15     			{
 16     				continue;
 17     			}
 18     
 19     			var cssString = (string)classes;
 20     
 21     			if (cssString.StartsWith("["))
 22     			{
 23     				var cssArray = Dynamicweb.Core.Converter.Deserialize<string[]>(cssString);
 24     				cssClasses.AddRange(cssArray);
 25     			}
 26     			else
 27     			{
 28     				cssClasses.Add(cssString.Replace(",", " "));
 29     			}
 30     		}
 31     
 32     		return string.Join(" ", cssClasses).Trim();
 33     	}
 34     }
 35     
 36     @{
 37     	string title = Model.Item.GetString("Title");
 38     	var accordionItems = Model.Item?.GetItems("Accordion_Items") ?? Enumerable.Empty<Dynamicweb.Frontend.ItemViewModel>().ToList();
 39     	string theme = !string.IsNullOrWhiteSpace(Model.Item.GetRawValueString("Theme")) ? " theme " + Model.Item.GetRawValueString("Theme").Replace(" ", "").Trim().ToLower() : "";
 40     	var decorations = Model.Item?.GetList("CssDecorations")?.GetRawValue().OfType<string>() ?? Enumerable.Empty<string>();
 41     	string css = RenderCustomCSS(decorations);
 42     	string contentPadding = Model.Item.GetRawValueString("ContentPadding", "none");
 43     	contentPadding = contentPadding == "none" ? "p-0" : contentPadding;
 44     	contentPadding = contentPadding == "small" ? "p-3 p-md-3" : contentPadding;
 45     	contentPadding = contentPadding == "large" ? "p-5 p-md-5" : contentPadding;
 46     }
 47     
 48     <div class="accordion @(theme) @(css) @(contentPadding) h-100 position-relative item_@Model.Item.SystemName.ToLower()" id="accordion-@Pageview.CurrentParagraph.ID">
 49     	@if (!string.IsNullOrEmpty(Model.Item.GetString("Title")) && !Model.Item.GetBoolean("HideTitle"))
 50     	{
 51     		string titleFontSize = Model.Item.GetRawValueString("TitleFontSize", "h2");
 52     		string headingLevel = Model.Item.GetString("HeadingLevel", "h2");
 53     		string headingLevelStart = $"<{headingLevel} class=\"{titleFontSize} mb-4\">";
 54     		string headingLevelStop = $"</{headingLevel}>";
 55     
 56     		@headingLevelStart
 57     			@Model.Item.GetString("Title")
 58     		@headingLevelStop
 59     	}
 60     	@foreach (var item in accordionItems)
 61     	{
 62     		<div class="accordion-item">
 63     			<h2 class="accordion-header" id="heading-@Pageview.CurrentParagraph.ID-@item.Id">
 64     				<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapse-@Pageview.CurrentParagraph.ID-@item.Id" aria-expanded="false" aria-controls="collapse-@Pageview.CurrentParagraph.ID-@item.Id">
 65     					@item.GetString("Title")
 66     				</button>
 67     			</h2>
 68     			<div id="collapse-@Pageview.CurrentParagraph.ID-@item.Id" class="accordion-collapse collapse" aria-labelledby="heading-@Pageview.CurrentParagraph.ID-@item.Id" data-bs-parent="#accordion-@Pageview.CurrentParagraph.ID">
 69     				<div class="accordion-body mb-0-last-child opacity-75">
 70     					@item.GetRawValueString("Content")
 71     				</div>
 72     			</div>
 73     		</div>
 74     	}
 75     	<div id="@Model.ID" class="user-select-none position-absolute top-0" style="scroll-margin-top:var(--header-height,150px)"></div>
 76     </div>
 77