Index: branches/5.3.x/core/ckeditor/plugins/my_link/plugin.js
===================================================================
diff -u -N -r16224 -r16395
--- branches/5.3.x/core/ckeditor/plugins/my_link/plugin.js	(.../plugin.js)	(revision 16224)
+++ branches/5.3.x/core/ckeditor/plugins/my_link/plugin.js	(.../plugin.js)	(revision 16395)
@@ -362,7 +362,7 @@
 									},
 									setup : function( data ) {
 										var $me = this;
-										var $link_url = data.url.url;
+										var $link_url = data.url ? data.url.url : '';
 										var $ajax_url = CKEDITOR.basePath.replace( /core.*$/, 'admin/index.php?events[fck]=OnLoadCmsTree' );
 										var $internal_page_anchors = this.getDialog().getContentElement( 'info', 'internalPageAnchors' );