Fatal error: Uncaught Error: Call to undefined function add_action() in /home/polirqqx/shortstoriesbyai.com/wp-content/plugins/shipper/lib/upgrader.php:106 Stack trace: #0 /home/polirqqx/shortstoriesbyai.com/wp-content/plugins/shipper/shipper.php(48): require_once() #1 {main} thrown in /home/polirqqx/shortstoriesbyai.com/wp-content/plugins/shipper/lib/upgrader.php on line 106