System.ArgumentNullException: Value cannot be null. (Parameter 's')
   at System.Int32.Parse(String s)
   at AspNetCore.Views_Partials_Components_BH_CMP_Faq.ExecuteAsync() in C:\HostingSpaces\admin\www.equity.co.uk\production\Release-4-\Views\Partials\Components\BH_CMP_Faq.cshtml:line 6
   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.TagHelpers.PartialTagHelper.RenderPartialViewAsync(TextWriter writer, Object model, IView view)
   at Microsoft.AspNetCore.Mvc.TagHelpers.PartialTagHelper.ProcessAsync(TagHelperContext context, TagHelperOutput output)
   at Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperRunner.<RunAsync>g__Awaited|0_0(Task task, TagHelperExecutionContext executionContext, Int32 i, Int32 count)
   at AspNetCore.Views_Partials_grid_DocTypeGridEditorCustom.<>c__DisplayClass8_0.<<ExecuteAsync>b__0>d.MoveNext() in C:\HostingSpaces\admin\www.equity.co.uk\production\Release-4-\Views\Partials\grid\DocTypeGridEditorCustom.cshtml:line 46
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperExecutionContext.SetOutputContentAsync()
   at AspNetCore.Views_Partials_grid_DocTypeGridEditorCustom.ExecuteAsync() in C:\HostingSpaces\admin\www.equity.co.uk\production\Release-4-\Views\Partials\grid\DocTypeGridEditorCustom.cshtml:line 44
   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_grid_editors_base.ExecuteAsync() in C:\HostingSpaces\admin\www.equity.co.uk\production\Release-4-\Views\Partials\grid\editors\base.cshtml:line 6