Fatal error: Uncaught Error: Class 'WP_Customize_Setting' not found in /home/nlqcqzmy/public_html/teachers/wp-content/plugins/themegrill-demo-importer/includes/importers/customize/class-oc-customize-demo-importer-setting.php:14 Stack trace: #0 {main} thrown in /home/nlqcqzmy/public_html/teachers/wp-content/plugins/themegrill-demo-importer/includes/importers/customize/class-oc-customize-demo-importer-setting.php on line 14