Error executing template "Designs/Swift-v2/Components/Specifications/Tab.cshtml"
System.ArgumentException: String parameter title cannot be null or empty (Parameter 'title')
   at Dynamicweb.Core.Ensure.Argument.NotNullOrEmpty(String value, String parameterName)
   at Dynamicweb.Content.PageService.GetPagesByTitle(String title)
   at CompiledRazorTemplates.Dynamic.RazorEngine_0152650c129743e59cae030b1073ab35.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)
   at Dynamicweb.Rendering.TemplateRenderingService.Render(Template template)
   at Dynamicweb.Rendering.Template.RenderRazorTemplate()


  1     @inherits Dynamicweb.Rendering.ViewModelTemplate<Dynamicweb.Frontend.ParagraphViewModel>
@using Dynamicweb.Ecommerce.ProductCatalog
@using System.Collections.Generic

@{
    var groups = GetViewParameter("Groups") as List<FieldGroupViewModel>;
    bool hideGroupHeaders = GetViewParameterBoolean("HideGroupHeaders");
    bool hideTitle = GetViewParameterBoolean("HideTitle");
    string size = GetViewParameterString("Size");
    string title = Model.Item.GetString("Title");
    bool hideLabels = Model.Item.GetBoolean("HideFieldLabels");
    string titleFontSize = Model.Item.GetRawValueString("TitleFontSize", "display-4");
    string gapCss = size == "full" ? " gap-4" : " gap-2";

    if (!hideTitle)
    {
        <h2 class="g-col-12 @titleFontSize">@title</h2>
    }


    @foreach (var group in groups)
    {   @*<div>@GetViewParameterString("ProdID")</div>*@
        
        var pageService = new Dynamicweb.Content.PageService();
        var page = pageService?.GetPagesByTitle(GetViewParameterString("ProdID"))?.FirstOrDefault() ?? null;
        
        var isFirst = group == groups.First();
        var activeClass = isFirst ? "active show" : "";
        <div class="tab-pane pt-4 fade @activeClass" id="@group.Name.ToLower().Replace(" ", "-")" role="tabpanel"
             aria-labelledby="@group.Name.ToLower()-tab" tabindex="0">


            @foreach (var field in group.Fields)
            {
                if (group.Name == "Description" && page != null)
                {
                    @RenderGrid(page.ID)
                    continue;
                }
                if (!hideLabels && group.Fields.Count > 1)
                {
                    <dt class="g-col-4">@field.Name</dt>
                    <dd class="g-col-8 mb-0 text-break">@RenderPartial("Components/Specifications/Shared/FieldValue.cshtml", field)</dd>
                }
                else
                {
                    <dd class="g-col-12 mb-0 text-break">@RenderPartial("Components/Specifications/Shared/FieldValue.cshtml", field)</dd>
                }
            }

        </div>

    }

}