During troubleshooting above issue, I checked errors in logs folder. After I re-indexing the search, I saw the following errors (only in re-indexing, I didn’t see in viewing pages.). Please see details in attachments. I checked the template and the file exists in the folder. Not sure how to solve this issue.
Message: System.ArgumentException: Cannot find template "~/Frontend-Assembly/Telerik.Sitefinity.Frontend/GridSystem/Templates/grid-12.html".
at Telerik.Sitefinity.Frontend.GridSystem.GridControl.GetTemplate(Boolean isVirtualPath, Boolean isHtmlTemplate, String layout)
at Telerik.Sitefinity.Frontend.GridSystem.GridControl.GetTemplate()
at Telerik.Sitefinity.Web.UI.LayoutControl.Initialize()
at Telerik.Sitefinity.Web.UI.LayoutControl.CreateChildControls()

(Logged the item on behalf of @rlee2015)