Fatal error: Uncaught Error: Class 'WP_Customize_Setting' not found in /var/www/html/wp-content/plugins/one-click-demo-import/inc/CustomizerOption.php:14 Stack trace: #0 {main} thrown in /var/www/html/wp-content/plugins/one-click-demo-import/inc/CustomizerOption.php on line 14