Fatal error: Uncaught Error: Call to undefined function add_action() in /home/globaltourtourds/public_html/wp-content/plugins/wp-travel/core/ajax/trip-pricing-categories-taxonomy.php:5 Stack trace: #0 /home/globaltourtourds/public_html/wp-content/plugins/wp-travel/core/ajax/trip-pricing-categories-taxonomy.php(53): WP_Travel_Ajax_Trip_Pricing_Categories_Taxonomy::init() #1 {main} thrown in /home/globaltourtourds/public_html/wp-content/plugins/wp-travel/core/ajax/trip-pricing-categories-taxonomy.php on line 5