Fatal error: Uncaught Error: Call to undefined function uListing\Admin\Classes\add_action() in /home/mamnilcom/public_html/wp-content/plugins/ulisting/includes/admin/classes/StmListingAttributePanel.php:72 Stack trace: #0 {main} thrown in /home/mamnilcom/public_html/wp-content/plugins/ulisting/includes/admin/classes/StmListingAttributePanel.php on line 72