To troubleshoot this issue, open this file via FTP or cPanel FileManager /wp-content/plugins/bookly-addon-pro/frontend/modules/woo_commerce/Controller.php and in line 65, delete "&" symbol from the "&$wc_item" parameter.
To troubleshoot this issue, open this file via FTP or cPanel FileManager /wp-content/plugins/bookly-addon-pro/frontend/modules/woo_commerce/Controller.php and in line 65, delete "&" symbol from the "&$wc_item" parameter.