Fatal error: Uncaught Error: Call to undefined function add_action() in C:\xampp\htdocs\wp-content\plugins\chatbot\class-qc-free-plugin-upgrade-notice.php:34 Stack trace: #0 C:\xampp\htdocs\wp-content\plugins\chatbot\class-qc-free-plugin-upgrade-notice.php(203): QcchatbotPluginUpgradeToProNotice->__construct() #1 {main} thrown in C:\xampp\htdocs\wp-content\plugins\chatbot\class-qc-free-plugin-upgrade-notice.php on line 34