Fatal error: Uncaught Error: Using $this when not in object context in /home/andrea/wp/wordpress/wp-content/plugins/taxonomy-terms-order/taxonomy-terms-order.php:136 Stack trace: #0 /home/andrea/wp/wordpress/wp-settings.php(254): include_once() #1 /home/andrea/wp/wordpress/wp-config.php(92): require_once('/home/andrea/wp...') #2 /home/andrea/wp/wordpress/wp-load.php(37): require_once('/home/andrea/wp...') #3 /home/andrea/wp/wordpress/wp-blog-header.php(12): require_once('/home/andrea/wp...') #4 /home/andrea/wp/wordpress/index.php(17): require('/home/andrea/wp...') #5 {main} thrown in /home/andrea/wp/wordpress/wp-content/plugins/taxonomy-terms-order/taxonomy-terms-order.php on line 136