Fatal error: Uncaught Error: Call to undefined function add_action() in /home/adaptyo3/public_html/wp-content/plugins/simple-taxonomy-ordering/lib/options.php:20 Stack trace: #0 /home/adaptyo3/public_html/wp-content/plugins/simple-taxonomy-ordering/lib/options.php(218): YIKES_Simple_Taxonomy_Options->__construct() #1 {main} thrown in /home/adaptyo3/public_html/wp-content/plugins/simple-taxonomy-ordering/lib/options.php on line 20