Fatal error: Uncaught Error: Class 'WP_Customize_Setting' not found in /var/www/html/wp-content/plugins/kirki/kirki-packages/util/src/Setting/Site_Option.php:18
Stack trace:
#0 {main}
thrown in /var/www/html/wp-content/plugins/kirki/kirki-packages/util/src/Setting/Site_Option.php on line 18