Error in loading content block `blockList/Components/accordionSection.cshtml`

System.NullReferenceException: Object reference not set to an instance of an object.
   at Umbraco.Extensions.PublishedContentExtensions.Url(IPublishedContent content, IPublishedUrlProvider publishedUrlProvider, String culture, UrlMode mode)
   at AspNetCore.Views_Partials_blockList_Components_accordionSection.ExecuteAsync() in C:\Server Files\Websites\criticalcarenetwork_com_au\Website\Views\Partials\blockList\Components\accordionSection.cshtml:line 18
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, Boolean invokeViewStarts)
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)
   at Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.RenderPartialCoreAsync(String partialViewName, Object model, ViewDataDictionary viewData, TextWriter writer)
   at Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.PartialAsync(String partialViewName, Object model, ViewDataDictionary viewData)
   at AspNetCore.Views_Partials_blocklist_default.ExecuteAsync() in C:\Server Files\Websites\criticalcarenetwork_com_au\Website\Views\Partials\blocklist\default.cshtml:line 10