weird colorbox jquery error line 139

I am getting a weird error message.
When you do a search and have several results to display the error does not appear.

It only appears when you do a SEARCH on my blog and returns a NO RESULT or blank search query…

here is the whole line from the page:

Notice: Trying to get property of non-object in …/htdocs/blog/wp-content/plugins/lightbox-plus/classes/actions.class.php on line 139
<!– Lightbox Plus ColorBox v2.6/1.3.32 – 2013.01.24 – Message: –>
<script type=”text/javascript”>
jQuery(document).ready(function($){
$(“a[rel*=lightbox]”).colorbox({initialWidth:”30%”,initialHeight:”30%”,maxWidth:”90%”,maxHeight:”90%”,opacity:0.8});
});
</script>
<script type=’text/javascript’ src=’https://www.edparton.com/blog/wp-content/plugins/lightbox-plus/js/jquery.colorbox.1.3.32.js?ver=1.3.32′></script&gt;

A small nuisance but I can’t find out why Lightbox Plus is giving an error on a Search and not anywhere else??

Thanks!