Fatal error: Uncaught Error: Using $this when not in object context in /wp-content/plugins/taxonomy-terms-order/taxonomy-terms-order.php:123 Stack trace: #0 /wp-settings.php(371): include_once() #1 /wp-config.php(97): require_once('/wp-settings.ph...') #2 /wp-load.php(37): require_once('/wp-config.php') #3 /wp-blog-header.php(13): require_once('/wp-load.php') #4 /index.php(17): require('/wp-blog-header...') #5 {main} thrown in /wp-content/plugins/taxonomy-terms-order/taxonomy-terms-order.php on line 123