Fatal error: Uncaught Error: Call to undefined function add_shortcode() in D:\www\wordpress - 安裝環境+外掛測試\02.外掛程式\常用外掛\better-chat-support-pro\view\shortcodes\custom-shortcode.php:11 Stack trace: #0 {main} thrown in D:\www\wordpress - 安裝環境+外掛測試\02.外掛程式\常用外掛\better-chat-support-pro\view\shortcodes\custom-shortcode.php on line 11