Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/pac84520/public_html/wp-content/plugins/wp-lister-ebay/classes/integration/WooBackendIntegration.php:11 Stack trace: #0 /home/pac84520/public_html/wp-content/plugins/wp-lister-ebay/classes/integration/WooBackendIntegration.php(2285): WPL_WooBackendIntegration->__construct() #1 {main} thrown in /home/pac84520/public_html/wp-content/plugins/wp-lister-ebay/classes/integration/WooBackendIntegration.php on line 11