Invalid Argument Supplied – class-wp-list-table.php

Hello. I tried adding the featured image to my custom post type admin listing, and after I did that, and updated the plugin to the latest verison, I am now getting the follow error on my custom post type:

Warning: Invalid argument supplied for foreach() in /home/content/61/html/wp-admin/includes/class-wp-list-table.php on line 681

Warning: Invalid argument supplied for foreach() in /home/content/61/html/wp-admin/includes/class-wp-list-table.php on line 681

Warning: Invalid argument supplied for foreach() in /home/content/61/html/wp-admin/includes/class-wp-posts-list-table.php on line 500

Warning: Invalid argument supplied for foreach() in /home/content/61/html/wp-admin/includes/class-wp-posts-list-table.php on line 500

Warning: Invalid argument supplied for foreach() in /home/content/61/html/wp-admin/includes/class-wp-posts-list-table.php on line 500

I even tried deleting the plugin, and this was still coming up. Any insight on how to possibly fix this would be greatly appreciated. I’m at a loss now, and can’t figure out how to restore my columns back. 🙁

I also bought the premium add-on a while back too.

Thanks in advance!

http://wordpress.org/plugins/codepress-admin-columns/