The selected control type: [16] is not supported by your skin. Please add the [litAdditionalImages] control from the default [cat_grey-css_bs3] skin to the currently selected itempane module skin (select [View Options] from the module action menu to select the skin and [Edit Skin] to change the skin file) itempane.ascx or select a different [Control Type] in the module options (select [View Options] from the module action menu).