Product with many files

Error executing template "Designs/Swift/Paragraph/Swift_ProductListGroupImage.cshtml"
System.NullReferenceException: Object reference not set to an instance of an object.
   at CompiledRazorTemplates.Dynamic.RazorEngine_3855eeff4f66499bba24070c9351c5e8.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 68
   at Dynamicweb.Rendering.TemplateRenderingService.Render(Template template) in E:\A10\_w\2\s\src\Core\Dynamicweb.Core\Rendering\TemplateRenderingService.cs:line 14
   at Dynamicweb.Rendering.Template.RenderRazorTemplate() in E:\A10\_w\2\s\src\Core\Dynamicweb.Core\Rendering\Template.cs:line 805


  1     @inherits Dynamicweb.Rendering.ViewModelTemplate<Dynamicweb.Frontend.ParagraphViewModel>
  2     @using Dynamicweb.Frontend.Navigation
  3     @using Dynamicweb.Ecommerce.ProductCatalog
  4     @using Dynamicweb.Environment
  5     @using Dynamicweb.Frontend
  6     
  7     @{
  8     	ProductListViewModel productList = null;
  9     	if (Dynamicweb.Context.Current.Items.Contains("ProductList"))
 10     	{
 11     		productList = (ProductListViewModel)Dynamicweb.Context.Current.Items["ProductList"];
 12     	}
 13     	else if (Pageview.Page.Item["DummyProductGroup"] != null && Pageview.IsVisualEditorMode)
 14     	{
 15     		var pageViewModel = Dynamicweb.Frontend.ContentViewModelFactory.CreatePageInfoViewModel(Pageview.Page);
 16     		ProductListViewModel groupList = pageViewModel.Item.GetValue("DummyProduct") != null ? pageViewModel.Item.GetValue("DummyProduct") as ProductListViewModel : new ProductListViewModel();
 17     
 18     		if (groupList?.Products is object)
 19     		{
 20     			productList = groupList;
 21     		}
 22     	}
 23     }
 24     
 25     @if (productList is object) { 
 26     	string groupImage = productList?.Group?.Assets != null ? productList.Group.Assets.FirstOrDefault(x => x.Name == "LargeImage").Value : string.Empty;
 27     	if (groupImage.StartsWith("/") && !groupImage.StartsWith("/Files", StringComparison.OrdinalIgnoreCase))
 28     	{
 29     		groupImage = $"/Files{groupImage}";
 30     	}
 31     
 32     	string groupName = productList?.Group?.Name != null ? productList.Group.Name : string.Empty;
 33     
 34     	string ratio = Model.Item.GetRawValueString("ImageAspectRatio", string.Empty);
 35     	ratio = ratio != "0" ? ratio : string.Empty;
 36     	string ratioCssClass = ratio != string.Empty && ratio != "fill" ? " ratio" : string.Empty;
 37     	string ratioVariable = ratio != string.Empty ? "style=\"--bs-aspect-ratio: " + ratio + "\"" : string.Empty;
 38     	string fillClass = ratio == "fill" ? " h-100" : "";
 39     
 40     	var parms = new Dictionary<string, object>();
 41     	parms.Add("loading", "lazy");
 42     	parms.Add("columns", Model.GridRowColumnCount);
 43     
 44     	if (ratio == "fill") {
 45     		parms.Add("cssClass", "w-100 h-100");
 46     	}
 47     	else
 48     	{
 49     		parms.Add("cssClass", "mw-100 mh-100");
 50     	}
 51     
 52     	parms.Add("style", string.Empty);
 53     	parms.Add("alt", groupName);
 54     
 55     	if (!string.IsNullOrEmpty(groupImage)) {
 56     		<div class="item_@Model.Item.SystemName.ToLower()">
 57     			<figure class="m-0@(ratioCssClass)@(fillClass)" @ratioVariable>
 58     				@RenderPartial("Components/Image.cshtml", new FileViewModel { Path = groupImage }, parms)
 59     			</figure>
 60     		</div>
 61     	} else if (Pageview.IsVisualEditorMode) {
 62     		<div class="alert alert-dark m-0" role="alert">
 63     			<span>@Translate("Product list group image: The image will be shown here, if any")</span>
 64     		</div>
 65     	}
 66     } else if (Pageview.IsVisualEditorMode)
 67     {
 68     	<div class="alert alert-dark m-0" role="alert">
 69     		<span>@Translate("Product list group image: The image will be shown here, if any")</span>
 70     	</div>
 71     }
 72     
 73