I've added a custom post type to this theme and have created various categories for them. When I try and use the Categories widget, I get this message on the page where it should show up:
Catchable fatal error: Object of class WP_Error could not be converted to string in /home/content/47/8650547/html/istudyenglishonline/wp-includes/formatting.php on line 2583
I don't really know much about CSS, so don't want to play around too much. I have Path's child theme installed and my site is http://istudyenglishonline.com/
Any help would be greatly appreciated.