    <!-- Error while rendering the view [Default] - [System.InvalidOperationException: Error while rendering view: &#39;/Views/Website/layouts/MainLayout.cshtml&#39; (model: &#39;Sitecore.Mvc.Presentation.RenderingModel, Sitecore.Mvc&#39;).
 ---&gt; System.NullReferenceException: Object reference not set to an instance of an object.
   at Schlumberger.Feature.PageContent.Helpers.EmailSubscriptionTopicHelper.getEmailSubscriptionTopics() in D:\a\1\s\des-EAR-AA-2259-slb.com\sitecore\Schlumberger\src\Feature\PageContent\Code\Helpers\EmailSubscriptionTopicHelper.cs:line 26
   at ASP._Page_Views_Website_layouts__Subscribe_cshtml.Execute() in f:\xp1\cd\Views\Website\Layouts\_Subscribe.cshtml:line 46
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
   at System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
   at System.Web.Mvc.Html.RenderPartialExtensions.RenderPartial(HtmlHelper htmlHelper, String partialViewName, Object model)
   at ASP._Page_Views_Website_layouts_MainLayout_cshtml.Execute() in f:\xp1\cd\Views\Website\Layouts\MainLayout.cshtml:line 234
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
   at System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
   at System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model, ViewDataDictionary viewData)
   at Sitecore.Mvc.Presentation.ViewRenderer.Render(TextWriter writer)
   --- End of inner exception stack trace ---
   at Sitecore.Mvc.Presentation.ViewRenderer.Render(TextWriter writer)
   at Sitecore.Mvc.Pipelines.Response.RenderRendering.ExecuteRenderer.Render(Renderer renderer, TextWriter writer, RenderRenderingArgs args)
   at Sitecore.Mvc.Pipelines.Response.RenderRendering.ExecuteRenderer.Process(RenderRenderingArgs args)
   at Schlumberger.SLB.Website.Pipelines.Response.RenderRendering.ExecuteRenderer.Process(RenderRenderingArgs args) in D:\a\1\s\des-EAR-AA-2259-slb.com\sitecore\Schlumberger\src\Project\SLB\Code\Pipelines\Response\RenderRendering\ExecuteRenderer.cs:line 26] -->